COBALT STEEL DRILL BIT - Manufactured with 5% cobalt for maximum drilling power, this drill bit is better suited for cutting through harder steel and abrasive materials DRILL BIT INCLUDES - 10 x UK Drills Cobalt Drill Bit, Jobber M35 Metal Stainless Steel Cast Iron, perfect to start your professional drilling job or even a home DIY project FULLY GROUND DRILL BIT - The ground bits are formed by machining all the parts of a metal blank that don't look like a drill, making it more resistant to tougher material TO BE USED WITH - When fixed to any electric drill machine, these drill bits can drill through stainless steel, alloy, hardened steel and cast iron ABOUT US - We pride ourselves in providing the best quality drill bits for over 30+ years. From drilling wood & tiles to masonry, we're happy to be your professional choice!, Manufacturer: UK DRILLS THE PROFESSIONALS CHOICE