611-4464 RS compatible Heavy Duty Leveling Footmaster Castors are unique in their function allowing movement on a swivel castor and positioning on an anti vibration rubber pad by a Hexagonal Spanner adjustment. With a die cast aluminum body these sturdy multifunctional castors can take a load of 1500kg when stationery on the rubber pad and 750kg when moving on the castor wheel. Attachment to machinery and equipment is by a forged steel top plate and adjustment using hex dmpanner to raise and lover castors between height of 130mm to 145mm.