The DEWALT Extreme 2 Metal Drill Bit is suitable for portable or stationary drilling of steel, alloyed and non-alloyed, up to 900N/mm. Particularly suited to drilling sheet or thin materials where accurate burr-free holes are required. Very effective in wood and plastic materials. The patented split pilot point design eliminates walking/slipping on contact. The DEWALT DEWDT5545QZ drill bits have the following specifications Tip Diameter 9.5mm. Working Length 78mm. Overall Length 125mm. Pack Quantity 10.