. Unique cam action ratcheting system for easy and fast operation. Instant adjusting memory button retains jaw opening for repetitive work. Smooth box joint construction for greater strength. 13 position push button ensures perfect fit on all work piece sizes. Lever ratio is 10-1 for strong gripping power Knipex pliers wrench has been designed to save more time than any other pliers. It's a revolutionary superior tool for gripping, holding and bending. Also it's smooth parallel jaws avoid damage to plated and soft fittings. This 7" pliers has a slim profile and light weight, this allows easy access to confined areas. Made with the strength and durability to last!.