Set Includes: WMC2 φ 0.5 - φ 2.4 inches (13.8 - 60.5 mm), WMC4 φ 1.7 - 4.5 mm (special set is equipped with V-type adapter only); Features: You can perform all types of clamping work by replacing two types of adapters. The V-type adapter is suitable for coiling round materials such as pipes, and the round adapter is suitable for square pipes and flat plates. The screws are plated with copper to prevent welding sputters. The head of the tightening screw is hexagonal and comes with a quick turn handle.