IRWIN Vise-Grip 24R Locking C-Clamp 600mm (24in) can reach into places where ordinary clamps cannot be used. Fitted with regular tips, they are ideal for car body work, welding and sheet metal work. It has a Hex key adjusting screw that tightens to draw materials closer together and also provides controlled release. Specification Length 600mm (24in). Throat Depth 390mm (15.1/2in). Capacity 254mm (10in).