Suitable for almost all thin materials such as non-ferrous metals, sheet steel, plastic, or stainless steel. It can be used without pre-drilling and is burr-free in thin sheets. Ideal for deburring, creating round holes, drilling several diameters with one drill, and re-drilling existing holes. The spiral flute design provides longer life, reduces vibration, and allows for faster drilling progress. Diameter markings are present on both spirals. The 3-surface shank prevents slipping in the drill chuck. Available in three versions: HSS for 100% life, HSS-TiN for 125% life, and HSS-AlTiN for 150% life (no cooling required). The sizes include 5 steps: 4, 6, 8, 10, and 12 mm, with additional sizes of 4-12 mm, 6.0 mm, and 50 mm.