These unique water pump pliers open automatically. On squeezing the handles they automatically adjust to the required size. This simple single-handed operation completely cuts out all the fiddling around for the best fit. These pliers will save a great deal of time and frustration. Made to DIN ISO 8976 standard from tempered chrome vanadium steel with additional inductive hardening of the gripper jaws. A strong box joint ensures correct jaw alignment. These will easily grip round pipe up to 38m (1.5") diameter and hex nuts up to 40mm across the flats. Overall length 250mm.