The Bosch 2608587013 1-10 mm HSS-G ProBox Metal Drill Bit Set is a selection of 19 top quality bits designed for drilling a range of construction materials. These include iron (cast, malleable, and sintered), as well as steel (cast, alloyed and non-alloyed), non-ferrous metals and hard plastics. Ideal for drill drivers and still stands, the bits have a cylindrical shank system equal to the drill bit diameter. The 135 degree self-centring split-point tip unites flawless centring with active cutting, maintaining an excllent level of precision while avoiding wandering. Thanks to the split tip, the need to pilot drill or pre-punch is removed (up to 10mm). The high-speed-steel ensures the drilling rate is 40% faster and the feed pressure is up to 50% lower than standard chisel edge HSS drill bits. Ideal for trade professionals. Features and Benefits: Ideal for drilling iron (cast, malleable, and sintered), as well as steel (cast, alloyed and non-alloyed), non-ferrous metals and hard