The knipex 81 series plastic pipe grip pliers have exchangeable plastic jaws for sensitive surfaces and are great for siphons tube fittings and connectors the fine adjustment is ideal for adjustment to diverse diameters they have 25 adjustment positions and a box joint design with an ergonomic handle geometry they have a robust heavy duty design and are made from forged chrome vanadium electric steel that has been oil hardened the handles are fitted with a non slip plastic coating ideal for tigh