Colson Extra Heavy Duty Jacking Castor JA8SUB with a 200mm heavy duty polyurethane wheel can lift loads an additional 76mm in vertical height. With a side mounted attachment plate jacking castors can be used on a variety of equipment and machinery that require vertical movement as well as horizontal. The jacking operation is achieved by a hexagonal spanner at the top of the jacking unit. JA8SUB 200mm Heavy Duty Jacking Castor with Polyurethane Wheel 1000kg Load