Pliers help you grip, shape, secure, cut, bend, or even retrieve objects. Different types of pliers are available. Locking pliers, also called vise-grips or mole grips, can be locked into position and come in a variety of different structures including needle nose locking pliers and locking clamps that have different shapes to affix to various parts for welding. Other popular plier devices have specially-designed heads that include oval, needle, flat, round nose, and side cutters. Smooth, serrated, and cutter jaw types are available as well as units with and without leaf springs depending on your needs.