Smooth-Drilling for Large Holes - The HSS Sheet Metal Cone Drill Bit drills large holes with running smoothness in metal. This precision-ground bit has a straight flute for smooth drilling with a high cutting performance. Use this product for drilling big holes in thin materials like sheet metal, profiles and pipes, etc., without pilot drilling. It is also ideal for deburring and enlarging existing holes, without friction deposit, and works with non-ferrous metal, sheet steel and plastic. It has a cylindrical shank system and is intended for use in drill drivers and drill stands. Cylindrical shank compatible with three-jaw drill chucks. Features and Benefits • Drills Large Holes with Continuous Smoothness in Metal • HSS Sheet Metal Cone Drill Bit drills large holes with running smoothness in metal • This precision-ground bit has a straight flute for smooth drilling with high cutting performance Specifications Diameter: 16-30,5mm Total length: 76mm Shank diameter: 9mm