"This was an installation project in and of itself, but being able to wheel around this table is great.
These seem to be pretty good casters. The wheels are either soft rubber or polyurethane, not hard nylon. The four lock levers are plastic.
They have 3/8""-16 threaded stems and are shipped with a 3/8"" drill bit.
I suppose you could drill a new hole, but I just drilled out the 1/4-20 threaded rivets which held the original and now un-needed leveling feet. (These rivets are installed into pre-drilled 3/8 holes…) I also purchased some 3/8 split-ring lock washers separately to secure the casters, which may or may not be necessary--I just didn't want to have to fight with this again.
Installation on the frame of a Groomer's Best hydraulic table requires you to:
--Remove the four rectangular plastic end caps from the legs with a putty knife, flat screwdriver, etc.
--Hold each rivet steady inside the leg with needle-nose pliers as you drill the exposed face with the 3/8 bit.
--Install the casters and hardware* using needle-nose pliers and a 9/16"" wrench.
*I added lock washers between each nut and the frame, both inside the leg, and outside:
Wheel | Nut | Lock Washer | Frame | Lock Washer | Nut."