A directional lock has been added to our 125mm nylon castors. A directional lock is a way of making a swivel castor into a fixed castor temporarily - by locking the swivel head but not the wheel which means castor moves in one direction. Directional lock castors are great for cornering or pivoting. These heavy duty fabricated castors are suitable for a range of heavy duty applications carrying 700kgs each. 125mm Heavy Duty Castors Fabricated Nylon Wheel with Directional Lock