AllinOne Chamfer Drill Bit Set Four chamfer sizes: 25 mm, 510 mm, 1015 mm, and 1520 mm, with shank diameters from 6 mm to 12 mm. Designed to tackle a variety of projects with a single set. Precision for Countersinking Each bit features a true 90degree angle point for accurate countersinking, delivering clean results on circular or coneshaped holes. Durable and Efficient Constructed from speed steel with a titanium coating for enhanced durability and wear resistance in tough working conditions. Compatibility and Use Shank range 612 mm; suitable for use with tools that accept these sizes. Bench drills are recommended to achieve the chamfering results with minimal vibration. Usage Guidance For the chamfer effect and reduced shaking, prefer a bench drill over hand drilling. Practical Applications Woodworking: countersink screw heads in cabinetry and furniture assembly, with clean edge chamfers. Metalworking: countersink holes in aluminum or steel panels for flush screw heads. Plastic and composites: create smooth chamfers to improve fit and finish in assemblies.