The PETOL-TITAN Chain Tongs were designed for making up and breaking out pipes and other tubular products by hand. They will work any diameter above 1/8 inch depending upon the tong and chain length selected. The tongs are adjusted by pulling the chain tight around a workpiece and hooking the nearest chain pin into the ears of the jaw. The Chain Tongs have the following features: A high strength, heat-treated alloy chain for rugged, dependable service. Drop-forged jaws, properly hardened to withstand severe service. High strength alloy steels used throughout for long life with the toughest jobs. Specifications: Pipe Size: 3/8" - 6-1/4" Weigth: 6-3/4 lbs.