S&H Industries Cobalt Spot Weld Cutter Kit - 77419. Cobalt Spotweld Cutter Kit cuts faster and lasts much longer that HSS cutters. Made from superalloy cobalt Steel, the tips are self centering and safe for pneumatic drill use and designed to cut up to 5x faster than standard cutters. Kit includes one... - S&H Industries Cobalt Spot Weld Cutter Kit - 77419.