HSS conical drill bit. Drill hole diameter: 4 - 22.5 mm Shank diameter: 8 mm Tenifer-treated for surface hardening through reduced cold welding. Burr-free drilling and reaming of metal sheets, pipes, steel profiles, Cr-Ni steel, non-ferrous metal, acrylic glass and plastic up to a wall thickness of 5 mm. The hole diameters are signed by laser in both grooves. The scale is legible when the tool is rotating. The three-sided tappet shank prevents "slipping" in the drill chuck. https://elecena.pl/product/17884941/5208-hss-conical-drill-bit-4-22-5-mm-tenifer-treated 2021-04-26 https://elecena.pl/product/17884941/5208-hss-conical-drill-bit-4-22-5-mm-tenifer-treated 2021-10-21 https://elecena.pl/product/17884941/5208-hss-conical-drill-bit-4-22-5-mm-tenifer-treated 2022-10-15 https://elecena.pl/product/17884941/5208-hss-conical-drill-bit-4-22-5-mm-tenifer-treated 2024-03-02 https://elecena.pl/product/17884941/5208-hss-conical-drill-bit-4-22-5-mm-tenifer-treated 2025-10-05 https://elecena.pl/product/17884941/5208-hss-conical-drill-bit-4-22-5-mm-tenifer-treated 2026-01-31 https://elecena.pl/product/17884941/5208-hss-conical-drill-bit-4-22-5-mm-tenifer-treated 2026-02-09 https://elecena.pl/product/17884941/5208-hss-conical-drill-bit-4-22-5-mm-tenifer-treated 2026-07-15