Heat treated Chrome Molybdenum and Chrome Vanadium steel construction with a smooth satin finish. Deeply serrated and hardened teeth grip the workpiece from any angle. Curved jaw design applies maximum pressure to all four corners of nut or bolt head, making it ideal for high torque applications. Features one-hand, no-pinch, quick release grip which provides comfort and control, reducing hand fatigue and are much easier to use than traditional style locking pliers. Heavily knurled adjustment screw for extra grip. Supplied in tool roll.