Miniature butt-weld clamps align panels edge-to-edge and surface-to-surface with the appropriate 0.040" gap that helps you produce clean welds with minimal grinding. This improved design makes it easier to install the tool without the wingnut falling off. Innovative panel-alignment clamps make it easier for you to position flat or curved panels for precise butt welds. Intergrip panel-alignment clamps work like miniature butt-weld clamps that align panels edge-to-edge and surface-to-surface, leaving an ideal 0.040" gap for full weld penetration. Clamp the sections together, tack weld, and remove the Intergrip welding clamps for final welding. The result is a clean butt weld that requires little grinding, and is less likely to trap moisture.