Faithfull FAISC600 General Duty Sash Clamp - 600mm (24in) Capacity Faithfull heavy-duty clamps manufactured from a high quality carbon steel bar with large malleable iron clamping heads. Clamp bars have a Black Oxide coating with powder coated heads for complete rust protection. Other features include a high grade steel mainscrew with a wear resistant Acme thread which applies pressure quickly and smoothly. Tail slides are easily adjusted and secured by a steel pin passing through one of the locating holes. Tail slide and heads are flat bottomed so that the clamp can stand upright without support.