IRWIN TOOLS manufactures and distributes professional grade hand tools and power tool accessories worldwide for trade professionals who demand superior performance and durability on the job. IRWIN TOOLS' brand portfolio features user-preferred category leaders such as IRWIN®, Vise-Grip®, Marathon®, Quick-Grip®, Speedbor®, Strait-Line®, Marples®, Unibit®, and Hanson®. FOR PERCUSSION DRILLING in very hard materials such as granite EXTREMELY HARD AND WEAR RESISTANT CARBIDE guarantees up to 40% more holes compared to conventional masonry drill bits STONE MASONS favour this product for impact drilling of natural stone like granite SPECIAL SHAPED CUTTING EDGES mean higher durability resulting in 50% more accurately sized holes per drill bit