These 200mm extra heavy duty lockable castors are made of a heavy duty pressed steel zinc plated, housing a 200mm (8) polyurethane wheel mounted on a cast iron centre. This lockable castor wheel runs on ball journal bearings, making the heavier loads easier to move. The foot operated wheel brake simultaneously brakes both the swivel castor head and the wheel. These lockable castors are suitable for a range of heavy duty applications, carrying loads of 800kgs each. Combine 4 lockable castors to carry 2.4 tonnes!