The IRWIN® 10501908 Granite Drill Bit is designed for superior performance when drilling into granite and other hard materials. This high-quality bit offers excellent durability and precision for professional and DIY applications. Features: Designed for drilling granite and other hard materials. Provides excellent durability and precision. Suitable for professional and DIY use. Specifications: Brand: IRWIN® MPN: 10501908 EAN: 5709131008392 Drill Bit Diameter: 8.0mm Total Length: 200mm Working Length: 130mm. 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.