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Zinus

ZINUS Quick Lock Metal Smart Box Spring, 4 Inch Mattress Foundation, Strong Metal Structure, Easy Assembly, Twin, White

    • Based on 9,297 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Jun 6
Order within 23 hours and 30 minutes
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Size: Twin


Style Name: 4 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
  • LOW PROFILE DESIGN - A 4 inch height is perfect for taller mattresses or for those who enjoy their bed lower to the floor
  • THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door; Quick Snap assembly system makes set-up intuitive and stress-free
  • 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.

Size: Twin


Special Feature: Durable


Fill Material: Steel


Brand: Zinus


Color: Hassle & Headache Free - the Quick Lock Metal Smart Box Spring Comes Together With Easy-to-follow Instructions, Fewer Bolts and Absolutely No Headaches; Assembly That’s Intuitive and Packaging That Seems to Defy the Laws of Physics - Now That’s What We Call a New-age Box Spring See more


Model Name: Quick Lock Box Spring


Product Care Instructions: Hand Wash Only


Material: Steel


Product Dimensions: 74 x 38 x 4 inches


Item Weight: 30.3 pounds


Manufacturer: Zinus


Country of Origin: China


Item model number: OLB-QLBS-4T


Is Discontinued By Manufacturer: No


Thickness: 4 Inches


Fabric Type: Steel Interior Frame With Steel Slats and a Poly Jacquard Cover


Refill: Steel


Care instructions: Hand Wash Only


Assembly required: Yes


Warranty Description: Worry-free 5 year limited warranty included.


Batteries required: No


Included Components: Box Spring, Instruction Sheet


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jun 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.

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Top Amazon Reviews

    • Need a sturdy box spring for a Dream Cloud Hybrid Mattress, this is it!
Size: King Style Name: 4 Inch Design: Smart Box Spring
Review Image by Kindle Customer Kindle Customer
Review Image by Kindle Customer Kindle Customer
Review Image by Kindle Customer Kindle Customer
Review Image by Kindle Customer Kindle Customer
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. ... show more
Reviewed in the United States on June 15, 2023 by Kindle Customer Kindle Customer
    • Awesome purchase, you won't be disappointed
Size: King Style Name: 9 Inch Design: Smart Box Spring
Easy setup, well built, amazingly so quiet, worth the money.
Reviewed in the United States on December 8, 2023 by LVMlm
    • Easy to put together, improved the firmness of our soft foam mattress
Size: King Style Name: 4 Inch Design: Smart Box Spring
I just want to say I’m so glad this product exists. It’s well made and was very easy to put together. But most importantly, this was a major upgrade for our foam mattress and king size bed. Before the Zinus smart box spring, we just had our mattress on the wood slats that came with the bed. The mattress was too soft and lumpy, and we suffered for years. I was finally ready to start all over with a new mattress, new bed, everything. We had a budget of $3000, but before we spent the money I did a little research and read that a former platform might improve our droopy mattress. Our small investment in this smart box spring totally paid off, as we love the feel of our mattress now. It’s a completely upgraded experience. The bed no longer creaks every time we get in, and we’re both sleeping better. Fantastic product! ... show more
Reviewed in the United States on September 26, 2023 by Rupert P.
    • Super Design
Size: Queen Style Name: 4 Inch Design: Smart Box Spring
This is very easy to assemble; instructions are clear to follow, all pieces are labeled with numbers. Set of screws and tools are provided. Smart, amazing design, very steady frame that stabilized my wobbly bed. Everything was packed perfectly. Happy to have it.
Reviewed in the United States on November 18, 2023 by Maria
    • Just what we needed!
Size: King Style Name: 4 Inch Design: Smart Box Spring
The king box spring was easy to put together. I did it by myself in about 30 minutes. It is heavy in the box so I put the frame together on the floor and then put onto the bed and finished putting the slats and cover on. I don’t think I could have lifted by myself all put together without damaging our wooden bed/rails. The 4” height was perfect for our higher bed frame. It seems to have given more stability to our large wood bed and foam type mattress. ... show more
Reviewed in the United States on October 12, 2023 by JL miller
    • Great
Size: Queen Style Name: 9 Inch Design: Smart Box Spring
Super easy to put together. Very sturdy but not so heavy. Perfect box spring. Bought a second one.
Reviewed in the United States on December 2, 2023 by Thomas
    • Easy & Sturdy
My daughters share an attic bedroom and there was no way I was getting a standard store-bought box spring up the stairs (they have Full size beds). They both have memory foam hybris mattresses so the slats need to be closer than the standard inner sprind mattress so I was pleased when I found this product. Delivery via FedEx was delayed 2 days past the original guaranteed by date, but we did have a snow storm so I won't hold that against them! The packaging is long, not super heavy and I was easily able to hoist it up on my shoulder and carry it up to the attic by myself. It was well packaged and despite the box being a bit dinged there was no damage done to the foundation. Assembly was super easy. The pieces are clearly and well labeled and the instruction are simple picture instructions that are very easy to follow. Only 16 bolts to tighten and the cross slats easily click into place. Other than scissors to cut the tape on the box, there are no tools required, as it comes with a standard allen wrench and a really neat ratchet type allen wrench too. The cover zips on easily and once assemble, with help from my daughters, the foundation was easily placed onto the frame. It feels very sturdy and we are all pleased. Bonus... if they ever have to be moved, they will come apart just as easy. Only Issue I had: One of the boxes was missing the center support piece that goes down the middle of the foundation from head to foot. Through the Amazon orders screen I clicked on the product support which brought me to the manufacturers website where I could either call or fill in an online form. I filled in the online form, attached my proof of purchase and clicked submit..... I will update this review as to how they handled the issue. UPDATE: Same day I wrote the review and same day I contacted the manufacturer through their website: They promptly emailed me back. Since the seller was Amazon and I am within the Amazon return time window they advised me to contact Amazon directly. They provided the phone number and explained that Amazon would ship a full unit to me, I was to take the parts that I need and return the rest. I called Amazon and after verifying my information she was able to enter the parts exchange. I am receiving the new unit in 4 business days and have 30 days to return the parts that I don't use (or else they would charge me for another one - makes perfect sense). I am also able to call Amazon when I'm ready to return it and they will call into UPS to have them come pick it up. I feel like so far, it has been handled very well and quickly. I was afraid they would have me return the whole thing in exchange for a new one... so I'm very pleased at their solution. I will update again once everything is all set. ... show more
Reviewed in the United States on February 1, 2019 by Tamara Friend

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