Reinforced nylon body - engineered glass fibre nylon body for minimal distortion and movement. Rounded shoulders with updated ribs for added durability and strength. Die cast ergonomic release trigger. Reversible Jaw with push button tool free release allows fast conversion to a spreading tool. Removable soft jaw pads prevent marking of the workpiece. Steel I-Beam backbone - cold rolled steel heat treated for strength and durability. Sustained Clamping force 135kg. Max Clamping force 180kg