The Faithfull Bar Clamp & Spreader is made from heavy-duty ABS plastic with a high-tensile steel bar. Easy-to-use, single handed operation. Cushion gripped jaw pads help to protect the workpiece from damage. Tool-free head release allows the clamp to be quickly turned into a spreader, with a trigger operation to release the force, freeing it for adjustment.This Faithfull Bar Clamp & Spreader has the following specification: Clamp Capacity: 450mm (18in)Spreader Capacity: 710mm (28in)Clamping Force: 230kg