Designed for demanding applications with a cutting depth of 10.0 mm, it can be used for hand-held drilling up to a diameter of 27.0 mm. Equipped with the special FLOWSTEP® tip, it enables precise centering and fast initial drilling. The drill bit sits securely even on smooth or rounded surfaces-without slipping. The two cutting edges feature a proprietary cutting geometry that reduces axial and radial forces. Deburring occurs as the drill progresses through each subsequent stage. The high-quality high-speed steel (HSS) is finished with RUKO’s proprietary RUnaTEC coating. This ensures high wear resistance and temperature resistance Size S1, Ø 6.0 | 7.0 | 8.0 | 9.0 | 10.0 | 11.0 | 12.0 mm https://elecena.pl/product/29602016/101682p-step-drill-bit-hss-runatec-flowstep-s1-6-12-mm-diameter 2025-12-12 https://elecena.pl/product/29602016/101682p-step-drill-bit-hss-runatec-flowstep-s1-6-12-mm-diameter 2026-01-11 https://elecena.pl/product/29602016/101682p-step-drill-bit-hss-runatec-flowstep-s1-6-12-mm-diameter 2026-02-07 https://elecena.pl/product/29602016/101682p-step-drill-bit-hss-runatec-flowstep-s1-6-12-mm-diameter 2026-06-28