ZINUS Quick Lock Metal Smart Box Spring, 7.5 Inch Mattress Foundation, Strong Metal Structure, Easy Assembly, Queen, White, Hassle & Headache Free - Comes Together With Easy-to-follow In
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Availability:
In Stock.
Arrives
Monday, Oct 6
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Size: Queen
Style Name: 7.5 Inch
Design: Smart Box Spring
Features
- Steel Interior Frame With Steel Slats and a Poly Jacquard Cover
- HASSLE & HEADACHE FREE - The Quick Lock Metal Smart Box Spring comes together with easy-to-follow instructions, fewer bolts and absolutely no headaches; assembly thats intuitive and packaging that seems to defy the laws of physics - now thats what we call a new-age box spring
- DURABLY ENGINEERED - A durable steel frame is used to construct the interior framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
- THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door
- ASSEMBLY THATS A SNAP - Quick Snap assembly system means that this box spring comes together quicker and with fewer bolts
- Worry-free 5 year limited warranty included; box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
Description
We like to think of the Quick Lock Metal Smart Box Spring as the 2.0 version of your traditional mattress foundation. Made sturdier than ever by its substantial steel frame and with its game-changing assembly method, we’ve developed a better way to deliver great sleep to your door. Created with closely spaced slats to accompany your latex, memory foam or spring mattress, this durable box spring comes in three different thicknesses so your bed can be as short or as tall as you like it. The Smart Box Spring features our fool- proof Quick Lock assembly system, meaning you spend less time screwing in bolts, and you get to be pleasantly surprised by how simply and quickly it comes together. You may even pat yourself on the back once you’re done (in fact, we encourage that). We’re so sure of this foundation (along with hundreds of happy customers) that it’s backed by a 5 year worry-free warranty, so you can sleep confidently for years to come.
Product Dimensions: 79 x 59.5 x 7.5 inches
Item Weight: 50.5 pounds
Manufacturer: Zinus
Item model number: OLB-QLBS-75Q
Is Discontinued By Manufacturer: No
Fabric Type: Steel Interior Frame With Steel Slats and a Poly Jacquard Cover
Assembly required: Yes
Warranty Description: Worry-free 5 year limited warranty included.
Batteries required: No
Included Components: Foundation, Steel Slat, Cover
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Oct 6
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: King
Style Name: 4 Inch
Design: Smart Box Spring
This comes in a box weighing about 60 pounds. You can lug the box, or open it and cart the materials. Might take 4 trips. No big deal. Comes with extremely easy instructions, extra screws, and a small ratchet. No other tools needed. It goes together in about a half hour with one person. I got the king size and it fits fine. Very solid, no wonky give and no squeaks. People who write that it is hard to assemble likely struggle with making coffee. Hand screw the bolts everywhere, stand it on its edge, and tighten everything down. This way there is a little “play” which makes inserting bolts easy. Then lay it down and snap in the cross members. No hammer, no mallet. Just push in place and if needed, use your foot. There are no legs, it simply rests atop the existing wooden bed frame, headboard, sideboard. Fits just fine. I left the existing 1x4 slats and put this on top. The end result is a 4 inch deep frame that has cross members 3 inches apart. Plenty sturdy and very supportive. We replaced two 9 inch box springs and were able to lower the bed height with no loss of comfort. I did not bother with the cover because I simply saw no need for it since the sideboards hide the frame.. But if it is exposed, i suppose it does dress it up a tad, so do as you please. I’m very happy with it. BTW, the mattress is a 14 inch Satava pillow top if you were wondering.
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Reviewed in the United States on May 18, 2025 by JL Price in Florida
Size: King
Style Name: 4 Inch
Design: Smart Box Spring
Was skeptical but after assembly this bed support felt pretty sturdy. We purchased a Costco King-sized memory foam mattress and required 4" to bring the bottom of our mattress to the top of our bedframe. So far 3 weeks in and there is no squeaks or complaints. Ensure you have the correct orientation of the middle support beam, there is a thin layer of foam to keep the cross bars from rubbing metal to metal. I suspect the negative reviews due to noise are because this beam was installed upside down (Foam downwards). I considered using blue locktite for the fasteners but decided against this until the frame squeaks for the first time. This is excellent value and quality. Would buy again. This also appears to support a memory foam mattress properly with the 22 support cross-members. I also love how easy this can be put back into the box for moving. Box springs take up wayyy too much space for storage.
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Reviewed in the United States on June 22, 2025 by Amazon22
Size: King
Style Name: 4 Inch
Design: Smart Box Spring
We recently purchased a Dream Cloud Premier Hybrid Mattress two weeks ago to replace the mattress we had had on our king size bed for the last 10 years. This new hybrid mattress we bought from the Dream Cloud web site is great, but at a height of 14 inches, it was 5 inches thicker than what we had. After it arrived we decided to keep and use the current double box spring we had been using, which were 9" thick, and metal bed frame with headboard that we already had. But we found with that 5 inches of increased height with our new hybrid mattredd that the top of the bed was now much higher then we liked. We love our new mattress, but with having our mattress 5 inches higher it was a little more effort to get on the bed and our feet didn't touch the floor when we sat on the edge of the bed. We were new to the hybrid mattress requirement of not needing a regular box spring, so we decided to see if we could go lower. I read all the reviews for platform bed frames designed for a hybrid mattress. Many of these reviews, the ones made out of wood, complained about their platform bed frame not holding up, with their wood slats cracking, breaking, and making noise, legs breaking off, etc. We surely didn't want any of that plus we wanted to keep out headboard at the same time. Those reviews helped us decide on trying this metal box spring by Zinus. We selected the 4" thick choice for our king size bed cause we wanted the bed top lower. Let me tell you, we are 100% satisfied with the way it is constructed, the ease of putting it together, and the way our new 14" hybrid mattress fits on it. Everything fit like a glove. It doesnt make a sound if we get up or toss and turn, and the mattress stays in place. Here are a few pictures we took as we put it together from start to finish. Before we put the new 4" metal box spring together, we removed those two 9" box springs we had to make room for the new metal one. It took us about 30-40 minutes to put the metal pieces together but it all went smooth. Everything fit nice and easy. The small rachet wrench that is included was a big help in tighting everything. And it only 16 screw bolts were required to fasten everything. Once finished, this new box spring fit right inside the original metal bed frame we had. The fabric cover went on next and fit over the top like a fitted bed sheet. Next we placed our new 14" mattress on top of everything and were very excited with our it fit the bed now. We actually had more mattress support when we laid on the bed. My husband and I were also now able to sit completely on each side of the bed with our feet on the floor. Having the top surface of the bed 5 inches lower on a metal frame strong enough also to support everything has made all the difference. We couldn't be more satisfied. If you have a king size hybrid mattress and want it lower to get on easier with plenty of support underneath this is the metal smart box spring to get. UPDATE: 7 days later. Both of use are enjoying our new mattress very much, thanks to the 4" metal box frame. No moverment what so ever, solid as a rock. The lower height we now have has made all the difference. One thing I wanted to add if you order the king size box, is the box is heavy. My husband had to use a 2-wheel dolly to move it from the front door, through the house and into the rear bedroom. But once the box is open, all the pieces are marked and easy to connect. 2nd UPDATE: Box spring frame is still doing good. Has been a month since we received this, and we'll still 100% satisfied with our purchase. The upper mattress does not move at all, and makes no noise getting on, moving about on it, or getting off of it. We like it enough that we're going to purchase a similar box spring like this for a twin bed that we have in another room sometime this year.
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Reviewed in the United States on June 15, 2023 by Kindle Customer Kindle Customer
Size: Queen
Style Name: 4 Inch
Design: Smart Box Spring
Very well constructed and easy to assemble. They provide spare parts and with a conventional allen wrench and a mini ratchet with an allen head. Spacing between slats are excellent as is the cover (which aids in isolating/padding the metal edges of the foundation from the metal bed frame. Overall a good product for the money.
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Reviewed in the United States on August 18, 2025 by Stephen Thomas Ferrari
Size: King
Style Name: 4 Inch
Design: Smart Box Spring
First, I would like to say that this was the most enjoyable assembly I can remember in 20 years of home ownership. Super Easy. The box was easy to move. The pieces came out easily, everything was labelled. The directions were easy to follow, and everything clicked into place. It took a half hour, and mostly because I am very thorough and double check everything. We loved the allan wrench ratchet. Great idea. Second, my back no longer hurts from sleeping on our latex foam mattress. The narrow slats hold up the foam mattress and we no longer have sag in the mattress. I was worried we would have to get a new mattress, but this firm foundation made all the difference, compared to the old box-springs. Foam mattresses are heavy and do need proper support. I used to loathe going to bed, because my back chronically hurt. That is gone now. The only complaint that I have is that this is not quiet like others have mentioned. Perhaps I have a defective crossbar or two, but when I get on or off the bed, or move in the night, you can hear metal clanging on metal, which is unpleasant. Others seem to not have a problem, so maybe mine is a fluke, but it's my only complaint, and the only thing that keeps this from a VERY solid five star review.
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Reviewed in the United States on March 25, 2024 by Bryan D Gebhart