Unlike an open-end wrench with uneven compression that can cause surface damage, this Knipex pliers wrench offers zero backlash under pressure. With a 10-to-1 lever ratio, the cam action design ensures a strong, secure grip without hand or wrist strain. The self-ratcheting action allows for fast, easy operation while eliminating the need for additional tools. The Knipex pliers wrench is available in a number of grips and sizes for a variety of applications.