The Kupo KC-100 100mm Locking Castor Wheels with M10 thread 3 pcs is a set of 3 steel and rubber M10 threaded casters which fit M10 threaded female legs. They feature an integral braking system that prevents rolling, and is actuated with a tap of the foot. This durable set of casters has strong brakes to prevent the wheels from rolling and keeps your stand locked in place, no matter what load the stands are supporting.