Faithfull Step drills are used for cutting varying hole sizes in material up to 4 mm thick without changing the drill bit. Each drill cuts parallel holes within a specific size range, rising in 2mm increments. Sizes 4 to 14 mm. Increments of 2.0 mm. Max thickness 4 mm. Made from HSS ( High-Speed Steel ). Shank: 6 mm diameter. https://elecena.pl/product/27237262/faithfull-faisd412-hss-step-drill-bit-4-14mm 2024-11-12 https://elecena.pl/product/27237262/faithfull-faisd412-hss-step-drill-bit-4-14mm 2025-03-13 https://elecena.pl/product/27237262/faithfull-faisd412-hss-step-drill-bit-4-14mm 2025-03-24 https://elecena.pl/product/27237262/faithfull-faisd412-hss-step-drill-bit-4-14mm 2026-05-06 https://elecena.pl/product/27237262/faithfull-faisd412-hss-step-drill-bit-4-14mm 2026-07-12 https://elecena.pl/product/27237262/faithfull-faisd412-hss-step-drill-bit-4-14mm 2026-10-15