The Irwin masonry drills bits are designed for fast and efficient drilling in brickwork concrete and breeze block especially with cordless drills They drill up to 60 faster than competitive drill bits whilst maintaining the same high durability 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