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ZINUS Keenan Metal Mattress Foundation / Standing Box Spring / Headboard Brackets Included / Easy Assembly, Twin

4.5 4.5 out of 5 stars 5,052 ratings

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Twin

Purchase options and add-ons

Size Twin
Product Dimensions 74"L x 38"W x 14"H
Special Feature No Box Spring Needed, Durable
Color White
Finish Type Painted
Material
Steel
Style
Standing Box Spring
Maximum Weight Recommendation
350 Kilograms
Item Weight
30.27 Pounds

About this item

  • Strong and Durable Steel
  • ALL-IN-ONE SUPPORT - Made with the same steel structure of our tried and true box springs, the Keenan Mattress Foundation features a dependable mattress platform supported by multiple durable legs for stability you can count on
  • HEADBOARD COMPATIBLE - Included headboard brackets allow you to attach your favorite standard-sized headboard to the foundation; hardware for attachment is not included
  • DURABLY ENGINEERED - Durable steel is used to construct the interior framework of this reliable foundation for greater longevity; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
  • THOUGHTFULLY PACKAGED - All parts and instructions are packed into one compact box that ships straight to your door
  • Worry-free 5 year limited warranty included

Customer ratings by feature

Maneuverability
4.3 4.3
Sturdiness
4.3 4.3
Easy to assemble
4.3 4.3
38" 74" 14" 38"

Frequently bought together

$114.99
Get it as soon as Wednesday, Mar 27
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Ships from and sold by Amazon.com.
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ZINUS Keenan Metal Mattress Foundation / Standing Box Spring / Headboard Brackets Included / Easy Assembly, Twin
Zinus ZINUS Keenan Metal Mattress Foundation / Standing Box Spring / Headboard Brackets Included / Easy Assembly, Twin
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Price$114.99$85.99$108.99-9% $80.99
List:$89.00
$90.99-15% $79.09
Typical:$93.17
Delivery
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Thursday, Mar 28
Get it as soon as Wednesday, Mar 27
Customer Ratings
Maneuverability
4.3
4.4
4.5
4.3
4.4
Sturdiness
4.3
4.5
4.3
4.4
4.4
Easy to assemble
4.3
4.1
4.3
4.3
4.5
Sold By
Amazon.com
MAENIZI
HUEIIS
Amazon.com
VTWAZAST
Amazon.com
size
Twin
Twin
Queen
Twin
Twin
Twin
material
Steel
Metal
Steel, Fabric
Metal
Metal
max. recommended weight
350 kilograms
1500 pounds
3000 pounds
350 pounds
350 pounds
furniture finish
Alloy Steel
Alloy Steel
Metal
Alloy Steel
Alloy Steel
weight
30.27 pounds
25.29 pounds
23.1 pounds

From the manufacturer

Metal Smart BoxSpring
Strong Support for a Good Night's Sleep
boxspring metal frame
Form Meets Function

All-in-One Support

Enjoy the functionality of both a bed frame and box spring with one ingenious piece! A secure steel frame is supported by durable legs in the center, sides and corners of the foundation, making your bed frame a thing of the past. And brackets for attaching your own headboard are built right in, so you can personalize the bed to suit your existing décor.

Handyman Skills Not Required

Build It, Stress-Free

All tools, parts and instructions are conveniently packed into one box for set-up that takes less than an hour with a friend's help. Now that's what we call convenience!

Quick Assembly Icon

Are any tools required to assemble my box spring?

This box spring is shipped with everything you need to assemble it - all parts, tools and instructions can be found efficiently packed in the shipping box.

Does this box spring require a bed frame?

This box spring is cleverly engineered with convenient support legs that lift the foundation off the ground, meaning you can forgo the bed frame!

What kind of mattress can this box spring support?

Our box springs are designed to do it all! Rest your memory foam, latex or spring mattress on top for smooth snoozing.

What is the distance between slats?

For Twin and Full sizes, spacing is 6.3 inches. For Queen and King sizes, spacing is 6.7 inches.

Looking for specific info?

Product information

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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ZINUS Keenan Metal Mattress Foundation / Standing Box Spring / Headboard Brackets Included / Easy Assembly, Twin


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Product guides and documents

Product Description

The Keenan Metal Mattress Foundation definitely meets every expectation you might have for a box spring, plus more! This one-of-a-kind foundation conveniently rolls the box spring and bed frame into one easy-to-assemble piece. Simply place your mattress directly on top of this frame and you’re ready for many well-rested nights to come. Its solid steel framework provides strength and longevity to uphold any mattress, and its clever support legs mean that you don't need a bed frame to reap the benefits of this excellent support system. And as an added bonus, brackets for attaching your own headboard are built right in, so you can personalize the bed to suit your existing décor. A 5 year warranty is included for your peace of mind, and all of the tools, parts and instructions needed for quick and simple setup are packed into one box that ships right to your doorstep. Now that's what we call convenience!

Customer reviews

4.5 out of 5 stars
4.5 out of 5
5,052 global ratings

Customers say

Customers like the quality, ease of assembly, and portability of the bed frame. For example, they mention it's well made, sturdy, and easy to assemble. That said, opinions are mixed on squeak and fit.

AI-generated from the text of customer reviews

896 customers mention743 positive153 negative

Customers like the quality of the bed frame. They say it's well-made, sturdy, and holds up pretty good. The pieces came in perfect condition, making it nice and easy to set up. Customers also say the mattress and foundation are performing well.

"...End result: a decent looking box spring which provides a good support for the foam mattress on top of it...." Read more

"Will never go back to the old metal rails and box frame. Much cleaner look, easy assembly, sturdy and bypassed an expensive box frame purchase!..." Read more

"Perfect for the price, little difficulty getting things to line up during install but it was pretty simple other than that...." Read more

"...Sturdiness:The fully assembled box spring seems really sturdy. It does not creak or rattle or seem to move at all under the mattress...." Read more

731 customers mention592 positive139 negative

Customers find the bed frame easy to assemble. They say the directions are fairly easy to follow, and the tools and pieces come with the product. They also mention that the perfect machining of the parts ensures a fit like a glove.

"...Much cleaner look, easy assembly, sturdy and bypassed an expensive box frame purchase! I would definitely recommend this product!" Read more

"...It is well worth the time to put it together." Read more

"...I was able to put this together within 75min. It was super easy and instructions were not had to follow, just put the numbers together that are..." Read more

"...It doesn't squeak, was fairly easy to assemble and attach our existing headboard...." Read more

108 customers mention97 positive11 negative

Customers like the portability of the bed frame. They say it's remarkably easy to move around, and can be carried upstairs. It's lightweight yet feels really sturdy. Some mention that the bed is affordable and portable in case they move.

"...It will be much easier to take apart and move, for sure." Read more

"...Lightweight framing has made it easy to fix and move around...." Read more

"...This product was packaged very nicely and was so straightforward to move by one's self up and down stairs- a far cry from a traditional king size..." Read more

"...A very sturdy box spring. Certainly made getting it upstairs easy as it was in a 1x1x6 foot box (not light but manageable). Highly recommend." Read more

88 customers mention75 positive13 negative

Customers like the comfort of the bed frame. They mention that it provides good support for the foam mattress on top of it, and the mattress feels much better with this box spring. They also say that the bed is the perfect support under the mattress without needing a box spring, and that the 9 legs should supply great support. Customers also say the slats seem to support it fine, and it takes the stress off of their original bed frame, allowing for a good night's sleep.

"...End result: a decent looking box spring which provides a good support for the foam mattress on top of it...." Read more

"...Came with feet and a cover which were relatively easy to add. Very comfy and true to its size." Read more

"...I'm a large individual and it supports me very well. Instructions are almost not needed as this is very easy to put together...." Read more

"...It is sturdy and supports my mattress well. I'm glad I made this purchase!..." Read more

47 customers mention34 positive13 negative

Customers like the height of the bed frame. They mention that the legs give it a good height, it's perfect for their bedroom, and it adds extra height for easy getting up and standing. The height of frame is adjustable, and now with this it feels like a normal height bed.

"...would not be tall enough, however it worked perfectly and is not too low at all...." Read more

"...The height is perfect for her bedroom and it connected easily to her new headboard...." Read more

"...Final Thoughts:-I wish the frame was taller. The new bed seems to be much lower to the ground than my previous mattress and box spring...." Read more

"...34;Solid, sturdy, no squeaks." It is a perfect height - only one con. If you like under bed storage this is not the frame for you...." Read more

39 customers mention36 positive3 negative

Customers like the legs of the bed frame. They say it eliminates the need for a bed frame and is easy to assemble. The legs screw in to the bottom of the box spring. Customers also mention that the bed comes with brackets for adding a headboard.

"...It's the price of a normal box spring, but it has legs, so you don't have to spend the extra money for a bed frame as well if a mattress and box..." Read more

"...I love that this box spring has legs included, it made it so nice and easy to set up...." Read more

"...Very adventitious that it comes with legs so can turn into a bed. I'm a large individual and it supports me very well...." Read more

"...The bed comes with a headboard mounting bracket but the headboard we purchased from another mail order company did not fit and we had to separately..." Read more

162 customers mention56 positive106 negative

Customers are mixed about the squeak of the bed frame. Some mention that it makes no noise whatsoever, while others say that it started to squirm not even a week later.

"...1/3017 - Update - foundation is starting to squeak slightly...." Read more

"...It's been about 2-1/2 years and it's never made a sound. Still in perfect condition.2) Did I mention the ratcheting Allen wrench?..." Read more

"...to put in place, the cover is not easy to put on, and the squicky sound from the frame...." Read more

"I’ve had it less than 4 months and it already annoyingly squeaks." Read more

143 customers mention66 positive77 negative

Customers are mixed about the fit of the bed frame. Some mention that it fits in their frame perfectly, while others say that it didn't fit together perfectly. The tolerances were exactly to spec, and the mattress was true to size. However, some customers report difficulty getting things to line up during installation.

"Perfect for the price, little difficulty getting things to line up during install but it was pretty simple other than that...." Read more

"...The frame fit into the cover very easily; there's a zipper which goes around the bottom. The cover isn't super taut, so it zipped up quite easily...." Read more

"...the holes in the supports of the headboard, and the frame is narrower than the headboard legs...." Read more

"...It fit perfectly inside the opening of my wood bedframe and now I do not have to worry...." Read more

A must read review for Casper mattress owners
4 Stars
A must read review for Casper mattress owners
A review for Casper mattress ownersI bought this frame to serve as the base for my brand new king size Casper mattress. The box spring kit arrived a few days before my mattress, allowing me a little time to do some research on the best foundation to use for a Casper mattress. According to Casper's official documentation:"The best option is a slatted base frame (with slats no more than three inches apart) or a firm platform. With metal frames, you want to make sure that the base has unyielding wooden slats that are thick enough to support the bed."Based on this information I started to panic a little bit. When assembled, this frame has SIGNIFICANT gaps between the metal support rods, and definitely would not meet the 3 inch gaps recommended by Casper (in some spots there are big squares of space). I decided to go to a few mattress stores in town to look into a more traditional wood box spring, and found that every box spring in stock seemed to all have slats that had much more than 3 inches between them. After some consideration, I decided I would assemble the frame and if it felt sturdy enough I would go buy some lumber from the local hardware store and make my own wooden platform on top of the frame with 3 inch gaps. I decided to place the boards perpendicular to the metal supports in order to provide the most stable support possible. I purchased 6 1x10 inch boards for about $37 and had the hardware store cut them to 78 3/4". While at the hardware store I also looked around for some way to secure the boards to the frame to keep the boards from moving around. I ended up purchasing Velcro with adhesive and affixed one end of the Velcro to the cover of the metal frame and the other to the underside of the boards. I am really happy with how this DIY solution ended up working out, and now I don't have to worry about damage to the integrity of the mattress overtime or sagging (see my pictures for a better idea of what I did). Alternatively you could use plywood, but I liked the portability of the lumber as opposed to one giant piece of plywood.Assembling the frame:I admit after reading some of the reviews I was worried about the difficulty in assembling the frame. It turned out to be really easy. There are no written instructions, but the pictures were more than enough to get it assembled correctly on the first try. I assembled the metal frame myself with no additional tools in about an hour. I did have help lifting the frame in order to zip the cover on, but I am fairly confident I could have done that myself if I had to, but I would recommend having two people to do this to make sure you don’t tear the cover.Sturdiness:The fully assembled box spring seems really sturdy. It does not creak or rattle or seem to move at all under the mattress. I have slept on the fully assembled frame with a mattress and the lumber supports for several weeks now and have been very pleased with the overall sturdiness of this box spring.Headboard mounts:I purchased the box spring with the headboard mounts, but unfortunately the holes in the mount do not line up with the holes in the supports of the headboard, and the frame is narrower than the headboard legs. I will likely mount the headboard directly to the wall "hotel style". Don't plan on using the included headboard mounts to fit a king size headboard without modification.Feet/height:I purchased the model that has 9 little plastic legs that screw into the frame after you put the cover on. There are little sewn holes in the cover where you screw the feet in and were lined up perfectly to do this on the first try. The overall height of the frame and mattress, even with the feet was significantly lower than our previous queen bed set, so I ended up purchasing 3 inch risers to raise the bed to a more acceptable height.Final Thoughts:-I wish the frame was taller. The new bed seems to be much lower to the ground than my previous mattress and box spring.-We bought the 'standing box spring' version, so it came with little plastic feet/legs that screw into the bottom of the bossing over the cover. The legs are sturdy, and there's 9 in total.-Overall I am happy with this purchase, and think this was the better option when compared to a traditional king box spring. It will be much easier to take apart and move, for sure.
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Top reviews from the United States

Reviewed in the United States on February 16, 2019
224 people found this helpful
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Reviewed in the United States on December 22, 2023
3 people found this helpful
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Reviewed in the United States on February 18, 2024
Reviewed in the United States on September 1, 2016
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jg
4.0 out of 5 stars A must read review for Casper mattress owners
Reviewed in the United States on September 1, 2016
A review for Casper mattress owners

I bought this frame to serve as the base for my brand new king size Casper mattress. The box spring kit arrived a few days before my mattress, allowing me a little time to do some research on the best foundation to use for a Casper mattress. According to Casper's official documentation:

"The best option is a slatted base frame (with slats no more than three inches apart) or a firm platform. With metal frames, you want to make sure that the base has unyielding wooden slats that are thick enough to support the bed."

Based on this information I started to panic a little bit. When assembled, this frame has SIGNIFICANT gaps between the metal support rods, and definitely would not meet the 3 inch gaps recommended by Casper (in some spots there are big squares of space). I decided to go to a few mattress stores in town to look into a more traditional wood box spring, and found that every box spring in stock seemed to all have slats that had much more than 3 inches between them. After some consideration, I decided I would assemble the frame and if it felt sturdy enough I would go buy some lumber from the local hardware store and make my own wooden platform on top of the frame with 3 inch gaps. I decided to place the boards perpendicular to the metal supports in order to provide the most stable support possible. I purchased 6 1x10 inch boards for about $37 and had the hardware store cut them to 78 3/4". While at the hardware store I also looked around for some way to secure the boards to the frame to keep the boards from moving around. I ended up purchasing Velcro with adhesive and affixed one end of the Velcro to the cover of the metal frame and the other to the underside of the boards. I am really happy with how this DIY solution ended up working out, and now I don't have to worry about damage to the integrity of the mattress overtime or sagging (see my pictures for a better idea of what I did). Alternatively you could use plywood, but I liked the portability of the lumber as opposed to one giant piece of plywood.

Assembling the frame:
I admit after reading some of the reviews I was worried about the difficulty in assembling the frame. It turned out to be really easy. There are no written instructions, but the pictures were more than enough to get it assembled correctly on the first try. I assembled the metal frame myself with no additional tools in about an hour. I did have help lifting the frame in order to zip the cover on, but I am fairly confident I could have done that myself if I had to, but I would recommend having two people to do this to make sure you don’t tear the cover.

Sturdiness:
The fully assembled box spring seems really sturdy. It does not creak or rattle or seem to move at all under the mattress. I have slept on the fully assembled frame with a mattress and the lumber supports for several weeks now and have been very pleased with the overall sturdiness of this box spring.

Headboard mounts:
I purchased the box spring with the headboard mounts, but unfortunately the holes in the mount do not line up with the holes in the supports of the headboard, and the frame is narrower than the headboard legs. I will likely mount the headboard directly to the wall "hotel style". Don't plan on using the included headboard mounts to fit a king size headboard without modification.

Feet/height:
I purchased the model that has 9 little plastic legs that screw into the frame after you put the cover on. There are little sewn holes in the cover where you screw the feet in and were lined up perfectly to do this on the first try. The overall height of the frame and mattress, even with the feet was significantly lower than our previous queen bed set, so I ended up purchasing 3 inch risers to raise the bed to a more acceptable height.

Final Thoughts:
-I wish the frame was taller. The new bed seems to be much lower to the ground than my previous mattress and box spring.
-We bought the 'standing box spring' version, so it came with little plastic feet/legs that screw into the bottom of the bossing over the cover. The legs are sturdy, and there's 9 in total.
-Overall I am happy with this purchase, and think this was the better option when compared to a traditional king box spring. It will be much easier to take apart and move, for sure.
Images in this review
Customer image Customer image
Customer imageCustomer image
90 people found this helpful
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Reviewed in the United States on February 20, 2021
6 people found this helpful
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Top reviews from other countries

SP-Fisher
5.0 out of 5 stars Easy to assemble and has a finished look
Reviewed in Canada on May 20, 2023
Alex
5.0 out of 5 stars Great bed frame.
Reviewed in Canada on December 14, 2022
Brian Ross
5.0 out of 5 stars Sturdy, easy to manoeuvre and assemble, and doesn’t squeak
Reviewed in Canada on April 28, 2022
One person found this helpful
Report
Bill and Dawn cripps
4.0 out of 5 stars Box spring with legs
Reviewed in Canada on June 6, 2023
One person found this helpful
Report
Courtney
5.0 out of 5 stars Overall great
Reviewed in Canada on April 19, 2022