Fuller PRO Insulated Pliers are designed for trade use for everyday electrical work. They area made from high grade, induction hardened carbon steel for strength and long life service. The Onlgnose Plier has precision milled bevelled cutting edges and gripping surfaces which are hardened for longer life. They are well balanced and have a non-stick mechanism for easy repetitve cutting and gripping jobs.t for your hand and application and minimise fatigue. As with all Fuller PRO products there is a no questions asked lifetime guarantee.