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. This DEWALT Extreme 2 Metal Drill Bit has the following specification: Tip Diameter: 8.0mm.Working Length: 72mm.Overall Length: 117mm.Pack Quantity: 10.