The Irwin Step Drill Bits are designed for precise drilling in thin materials and have a single flute for maximum drilling control into sheet metal. Their unique flute design ensures perfect round holes in sheet metal. A fluted shank also prevents the drill bit from slipping in the chuck, along with a self centring point that will not walk and eliminates centre punching. Made from industrial grade M7 high-speed steel. Irwin Step Drill Bit. Number of hole sizes: 10. Hole diameters: 4, 6, 8, 10,12, 14, 16, 18, 20 and 22mm. https://elecena.pl/product/27222347/irwin-xae-10502853-step-drill-bit-4-22mm-10-holes 2024-11-11 https://elecena.pl/product/27222347/irwin-xae-10502853-step-drill-bit-4-22mm-10-holes 2025-03-12 https://elecena.pl/product/27222347/irwin-xae-10502853-step-drill-bit-4-22mm-10-holes 2026-05-03 https://elecena.pl/product/27222347/irwin-xae-10502853-step-drill-bit-4-22mm-10-holes 2026-05-25 https://elecena.pl/product/27222347/irwin-xae-10502853-step-drill-bit-4-22mm-10-holes 2026-06-17 https://elecena.pl/product/27222347/irwin-xae-10502853-step-drill-bit-4-22mm-10-holes 2026-07-10