I ended up putting two pairs of these on a 44" x 23" full extension drawer that I built into a tool chest I made for my power tools. More specifically, my 40 pounds. Miter saw that is uncomfortable to lift. I wanted the drawer to slide out easily so I could lift the saw straight up and place it on the stand. I bought a pair as they are rated at 100lbs but decided I should buy a second one as soon as I thought about the weight distribution and since I still had 1/2 inch of clearance I put a pair to the sides and moved the second pair apart on the closet floor. According to the instructions, the ยฃ100 rating is limited to a 24-inch-wide box, and I've had one twice that long. Turned out amazing, took 2 hours to perfectly align the 4 drawer slides! The instructions are otherwise not particularly helpful, but fortunately the assembly is not rocket science.