Jonard's pliers are made of heat treated carbon steel with induction-hardened cutting edges for maximum strength and durability. These pliers feature the following: Designed to press UR/UY/UG, 709 series connectors, crimping "B" type connectors, and AMP Tel-Splice connectors Utilized on combinations of plastic and pulp insulated 19, 22, 24, and 26 copper conductors as well as 20 gauge plastic insulated copper steel wire Ergonomically designed handle with dipped plastic grip for greater comfort and torque