Nice casters; well built; great price. Used one set on a 700# set up block on which I mounted a Delta Milwaukee shaper. Moves around the shop easily. Set the pads, (even just one), & it's solid as a rock without movement. Did crack one caster, (my fault entirely), when I set the block down too swiftly. The other three are fine. (Wish I could get just one to replace, but I just bought another set & now have 3 spares. Mounting was a breeze & very stable. Will be using a lot more of these around the shop on my welding table, welding rotator, surface plates, etc.