General description The 4pcs Deburring Chamfering Countersink set features high-speed steel (HSS) titanium chamfering knives designed for cutting metal, wood, and plastic. This set includes four specifications: 2-5mm, 5-10mm, 10-15mm, and 15-20mm, making it versatile for various applications. Technical specifications Material: HSS 4241 Hardness: Suitable for materials with hardness below 65HRC Design: 90-degree angle for optimal chamfering Rust and corrosion resistance Compatibility and accessories Compatible with common drills from brands such as Hilti, Bosch, Makita, Hitachi, Fein, AEG, Metabo, DeWalt, Schwarz & Decker, Brüder Mannesmann, Kress, Wolfcraft, Einhell, Milwaukee, Flex, and others. Recommended to use rust protection oil for maintenance.