The Irwin Granite drill bit range has been designed for impact / percussion drilling in very hard materials such as granite, concrete and natural stone. They can drill 40% more holes than conventional masonry drill bits due to an extra hard, thicker and more robust carbide tip. The rounded cutting edges mean higher durability resulting in 50% more accurately sized holes per drill bit. Size 4.0 x 80mm https://elecena.pl/product/27222958/irwin-10501896-granite-drill-bit-4-0-x-80mm 2024-11-11 https://elecena.pl/product/27222958/irwin-10501896-granite-drill-bit-4-0-x-80mm 2025-03-12 https://elecena.pl/product/27222958/irwin-10501896-granite-drill-bit-4-0-x-80mm 2025-03-23 https://elecena.pl/product/27222958/irwin-10501896-granite-drill-bit-4-0-x-80mm 2026-05-03 https://elecena.pl/product/27222958/irwin-10501896-granite-drill-bit-4-0-x-80mm 2026-07-10