Knipex’ 10" Auto Adjust Pliers offer a one-handed, automatic adjustment by squeezing the pliers handles (no second hand or separate adjustment is necessary). Self-gripping jaw design won't slip on the work piece. Locking button keeps handles in closed position for convenient storage. The pliers are forged from oil-hardened, Chrome vanadium electric steel for greater strength and have a capacity of up to 1-1/4".