KnKut 10.0 mm Spot-Weld Drill KnKut 10.0 mm Spot-Weld DrillKnKut Spot Weld Drills are designed to effectively auto panel spot welds. Made of Cobalt Steel, the high red hardness permits speeds 30% greater than high speed steel spot weld drills. Cobalt Steel is substantially more abrasion , resulting in a very long lasting cutting edge. KnKut Spot Weld Drills have a spur point, designed to through the weld on one panel while leaving only a slight penetration into the second panel. The modified point is chip .Made In USAKnKut Spot Weld Drills have a spur point, designed to through the weld on one panel while leaving only a slight penetration into the second panel.Chip PointMore Abrasion than HSS BitsDrills Stainless Steel and Titanium AlloyCobalt Steel KK3-10.0SW