Type C Manual Tong Manual Tongs Type C are the tools used to drill and unscrew various types of pipe strings and tools during drilling and workover operations. By changing the buckle heads and buckle steps, it can meet the needs of different sizes of pipe diameters and buckles. Applicable pipe diameter: 2.3/8-10.3/4in; maximum torque: 48kN.m; products are designed and manufactured according to API Spec 7K specifications.