Stem Caster Wheels 4 Inch Heavy Duty Threaded Stem Casters UNC 3/8''-16x1'' Swivel Casters Set of 4 Safety Dual Locking Wheel for Furniture and Cart

Stem Caster Wheels 4 Inch Heavy... https://www.amazon.com/dp/B0DR2PVQFG?ref=ppx_pop_mob_ap_share These. Makes moving machines ez pz. You just go through the same holes as the tabs used to bolt them to the ground normally, in commercial settings.