Bosch PRO HSS Countersink Bit

The 12mm Bosch PRO HSS Countersink Bit is a versatile mid-range size for deburring and countersinking pre-drilled holes in steel. It suits everyday fabrication and installation work where you need a neat, burr-free finish without stepping up to a larger bit. Made from high-speed steel (HSS), it offers strength and resistance to heat for dependable results. The 90° cutting edges help you produce clean countersink holes precisely where you need them, ready for fasteners to sit properly. The cylindrical shank fits three-jaw drill chucks, so it's easy to use with your existing