Heat treated Chrome Molybdenum and Chrome Vanadium steel construction with a nickel plated smooth satin finish. Suitable for clamping material whilst marking, welding, brazing, gluing or soldering. Features one hand no-pinch quick release grip which provides comfort and control, reduces hand fatigue and are much easier to use than traditional style locking pliers. Heavily knurled adjustment screw for extra grip with greasy fingers. Capacity: 0-50mm., Weight: 0.661386786 pounds, Manufacturer: Sealey