This medium duty self-leveling Footmaster is unique in it's function allowing movement on a swivel castor and positioning on an anti vibration rubber pad by a handwheel adjustment. With a die cast aluminum body these sturdy multifunctional castors can take a load of 250kg when stationery on the rubber pad and 125kg when moving on the castor wheel. Attachment to machinery and equipment is by an M12 threaded stem. Footmaster Self Leveling Castor 82-92mm 125kg Load Capacity Stem Fitting with Handwheel Black