Masonry drill bit 3.00 x 70mm irwin 10501827, the irwin masonry drills bits are designed for fast and efficient drilling in brickwork, concrete and breeze block, especially with cordless drills'. '.strtoupper('t')hey drill up to 60% faster than competitive drill bits whilst maintaining the same high durability'. '.strtoupper('t')he 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'. '.strtoupper('t')he bits are made with a chrome vanadium body with high carbon content which allows more hardening and a stronger bit for maximum rupture strength.irwin masonry drill bit for cordless drills'. '.strtoupper('s')pecificationsdiameter 6.5mm.total length 160mm.working length 115mm'. '.strtoupper('i')rwin® 10501827 masonry drill bit 6.5 x 160mm