The Irwin 10501814 Masonry Drill Bit is designed for fast and efficient drilling in brickwork, concrete, and breeze block, especially with cordless drills. It drills up to 60% faster than competitive drill bits while maintaining high durability. The single flute design ensures faster dust removal for increased drilling speed. The unique, pressed diamond-ground carbide tip allows for aggressive cutting and ensures 20% longer life compared to previous Irwin masonry drill bits. The bit is made with a chrome vanadium body with high carbon content, allowing for more hardening and a stronger bit for maximum rupture strength. Specifications: Diameter: 4.0mm. Total length: 80mm. Working Length: 45mm.