I bought some sturdy retail fixtures at a store sale to use as desks in our home office. They are beasts! Everything was great except for the old battered wheels and the threadbare/worn metal bushings in the legs. Legs - metal tubes with a square section. There were no square sockets in the local places. Revan to the rescue! I bought 2 sets of these sockets for these cutting tables and put smooth roller skate wheels on them. So happy!