Review on QWORK Durable Transfer Universal Conveyor by Ray Mcknight

I didn't know such bearings existed, but they are perfect. I'm making a mobile shelf that fits in my blind corner cabinet. I make a base out of 1/2" thick plywood, use a hole saw to drill a hole for each bearing, and lay the plywood over them. They can't come out, and the shelf slides in and out easily, so I slide it forward and can access things in the back of the closet without actually reaching into the closet.Much cheaper than Lazy Susan closet as well as less wasted space!