SHVHC15 | Stronghand Half Clamp The Efficient Safe Way to Align Materials. The DOG & WEDGE and CUT-OFF C-CLAMP methods of material alignment are messy time consuming and unsafe! Align materials in the fabrication of water tanks bulkheads deck sections flat plates etc. For big jobs tack weld additional 1-7/8? cut pipes along the joint. Copper Plated Acme Screw / Ductile Iron Body Thread: M20