These specialist bits are used to drill out the boron steel spot welds used in modern cars. They typically come in large diameters.

HaoTrade 2 Pieces Spot Weld Drill Bit Set, High-Speed Steel Cobalt Spot Welding Remover Cutter Drill Bits Welder Cobalt Tips, Spotting Cutter Power Drill...

Bestgle Spot Weld Drill Bit Set, HSS CO6 CO8 Rotary Spotting Cutter Power Drill Spot Welding Cutting Accessories Can Separate Spot Welded Panels Metalworking...
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