The Crescent Z2 Auto-Bite line of one handed adjust tongue and groove pliers is Crescent's most innovative range of professional grooved joint pliers. The patented Auto-Bite Lever enables true one handed jaw adjustment, simply squeeze the handles and the jaw automatically adjust to a precise grip. Aggressive tooth design increases torque transfer. They are forged from alloy steel and precision machined for long life and durability. The Z2 Auto-Bite pliers offer unique features such as slim jaws which enable 40% greater access and Grip Zone Handles for a non-marring grip. Ergonomic handles with tether point increase overall comfort and safety.