5 Inch Queen Metal Smart Box Spring with Quick Assembly, Mattress Foundation, Strong Metal Frame, Easy Assembly

Buy it, don’t hesitate. I chose the “New/upgraded with quick assembly” rather than “Original” option because easy assembly was important to me. I purchased the 5 inch box spring because I needed only a little lift for my queen mattress. This item is so perfect and SO easy to assemble! I got the box in the house alone and assembled it alone. Took 1 hour. The only hiccup was when I placed the middle connectors upside-down - make sure the holes are facing up only on the middle connector pieces marked “G” so that the middle rack can slide down into that slot. It’s a pain to disconnect if you place it wrong. The cover is so easy to get on, just like a fitted sheet. It did not slide off at all while placing the box spring onto the platform bed frame, which I also did alone. It doesn’t squeak or slide around. Love it!!

Easy to assemble picture directions I am 67 and I laid out all the pieces before I started . Just be sure to keep the sides marked “up” all up . The 8 screws are a little challenging because they use an Allen wrench and you can’t make a complete turn w it . However it’s easy to stand up on one end for better access to the screws . I was able to carry it into the bedroom by myself . Fit the queen bed frame fine .

Fantastic box spring. The item is easy to assemble and comes together in well less than an hour. Clever pop in pieces and few bolts make for a sturdy bed frame. A hex wrench and a little socket hex wrench are included, though I couldn’t get the knack of using the socket hex wrench. The regular hex wrench was more than adequate .The cover is well made and fits well. Pleased with this purchase

Here’s your final version with everything included, sounding natural and clear: ⸻ ⭐ 1 out of 5 stars – Do NOT buy this I purchased the Zinus 5-Inch Metal Smart Box Spring in August 2025, and I regret it completely. The construction is very poor for something that’s supposed to be sturdy. It’s a metal frame, but instead of feeling solid, it’s extremely noisy. Every movement causes loud squeaking and creaking. If you share the bed with a partner, this becomes a serious problem. Even normal movement makes noise—but anything more active makes it much worse. Honestly, having sex on this bed is not recommended, especially if you’re not alone in the house or apartment. It’s that loud. At this point, I can’t even get into bed without it making noise. I’ll even add a sound clip so you can hear how loud it is—I’m literally just turning from one side to another. Highly not recommended. Save your money and look for something better built.

Easy to assemble. Sturdy. Only down side was the slats. Mattresses these days are made differently with foam, gel, etc so the slats don’t give total support. We had to add a thin plywood on top. Otherwise it works fine for our use.

The Sinus twin boxspring worked great for my needs at a good price in the size that I needed, 5 in. The quality is very good and sturdy and fits a twin frame perfectly. I plan on putting a air mattress on top of it for visitors. One piece was missing on the tip of a cross rod, lost in the shipment but the company responded quickly and replaced it immediately. Good customer service! Recommend buying this if you need a good twin box spring. Update 9-14-25. Twin box spring started collapsing periodically. Unfortunately I had to buy wood slats to support it so it wouldn't collapse.

Very nice box springs easy assembly recommended

I was surprised at how quick and easy this box spring was to put together, it took me less than 5 minutes. The height is perfect for keeping my 18 month olds bed at a comfortable height to ensure if she does fall off her bed it’s not too high. The metal frame feels solid and not only supports the mattress and her really well but also an adult. This made the transition from crib to bed effortless, she’s gotten such good sleep on her new bed. No creaking or wobbling so far. Great value for the price—I’d definitely recommend it!