Easy To Use: Loosen the winged nut from the alignment screw and then wedges two panel across from each others between the square body and the clamp block; Tighten the winged nut to make sure a firm fixation Our butt welding clamps issuitable for both straight panel or curved panel The welding clip can be used at precisions butt welding and Edges to Edges welding The welding clamps is make of steel, enduring, rustproof and Fit for welding cracks metal floor, automotive sheet metal surfaces and door skin, Manufacturer: Yhplxyuus