I love these castors! Had a half dozen workshop tools, the same number of carts, and now I don't worry about plastic wheels breaking when moving! I can load up carts as heavy as needed (think 300 board feet of walnut or a lumber cart with scraps and 18 full sheets of plywood) and they handle the load with no sweat. Grease them, put good bolts on, then forget about them. Lock works well and locks rotation and swivel. Measure your bolts as there isn't a lot of clearance for thread stick out.