Capacity: Clamping for tube and pipe ranging from 2"to 4"(60mm-110mm) Designed for accurancy to butt welds and pipe fittings. It's satisfy different needs for craftsmen,home and workshop use. Designed with 3 pads,which can effectively ensure solid clamping, and each pad with a alignment screw which can effectively ensure accurate fixation. Crafted from alloy steel, this tool is built to last. Surface neckel plated protect it from rust and has good durability. This pipe fitting clamp is built to offer consistent performance. It is not only for welding,pipe fitting but for woodworking,and more. Xiao & Dao Pro Locking C-Clamp,Pipe and Tube Clamp With 3 Pads,2 to 4 in,Steel Pipe Alignment Tool 13''