611-4420 RS compatible Medium Duty foot master levelling castors are unique in their function allowing movement on a swivel castor and positioning on an anti vibration rubber pad by a handwheel adjustment. With a die cast aluminium body these sturdy multi functional 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 a forged steel top plate allowing lift from 82mm to 92mm Footmaster Levelling Castor with Plate Fitting 125kg Load Capacity 50mm