M100 for average domestic spot welds (10mm).
High Speed Steel Cobalt (HSCo) spot-weld bit
Specifically designed to be used in Spot Weld Remover Drill, Item No. KT14718
Flats on the shank are ground for strength, plus a centering nib to help prevent walking
Titanium Nitride coating helps extends drill life and prevents dulling due to overheating
CAUTION: Any cutting tool may break or shatter under improper use. Government regulations require use of safety glasses and other appropriate safety equipment at all times in the vicinity of use.