Pliers and Wrench in one tool! The Knipex Plier Wrench is a revolutionary tool for gripping, holding and bending. They feature instant adjusting memory button that retains jaw opening for repetative work and zero backlash of smooth parallel jaws to avoid damage to plated or soft fittings. Self-locking feature eliminates slipping off joint or shift of gripping surface. Their unique cam action provides enormous leverage and smooth box joint costruction provides greater strength.