<br />The single flute design ensures faster dust removal for increased drilling speed, with the unique, pressed diamond-ground carbide tip allows for aggressive cutting and the carbide tip design also ensures 20% longer life compared to previous Irwin masonry drill bits. The bits are made with a chrome vanadium body with high carbon content which allows more hardening and a stronger bit for maximum rupture strength.<br /><br />Irwin Masonry Drill Bit for Cordless Drills.<br /><br />Specifications:<br />Diameter: 5.5mm.<br />Total length: 160mm.<br />Working Length: 115mm.">