Bosch PRO HSS Countersink Bit

The Bosch PRO Steel HSS Countersink Drill Bit in 20mm is the largest in the range, designed for countersinking and deburring the widest pre-drilled holes in steel. This 20mm variant is the go-to choice when you need maximum coverage for larger-diameter fixings and heavy-duty steel fabrication work. Built from high-speed steel (HSS), it offers exceptional strength and heat resistance even under sustained use. The 90° cutting edges cut cleanly and accurately through soft metal, ensuring burr-free countersink holes to a professional finish. Compatible with standard three-jaw drill chucks via its cylindrical shank, it integrates easily into your existing setup. Features and Benefits: • HSS construction for superior strength and heat resistance • 90° cutting edges for precise, burr-free countersinking in steel • Effective deburring of pre-drilled holes in soft metal • Cylindrical shank compatible with three-jaw drill chucks