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