This extra heavy duty castors are able to carry 500kgs each, overall height 240mm, 4 x M10 Bolt Fixing Plate, these lockable castors made of a heavy duty pressed steel zinc plated, housing a solid 200mm rubber wheel mounted on an aluminum centre. These industrial castor wheels 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 heavy duty castors are suitable for a range of heavy industrial applications.