Sealey AK4734 Solid Cobalt Spot Weld Drill [8mm]Suitable for drilling out spot welds on most common vehicle panels including galvanized and high-stress steelsMade from HSS with 5% Cobalt for longer lifeSuitable for drilling out spot welds on most common vehicle panels including galvanized and high-stress steels. Made from HSS with 5% Cobalt for longer life.