This 5.5mm diameter, 160mm length Irwin Masonry Drill Bit provides precise 5.5mm sizing with the extended reach of 160mm, making it ideal for deeper drilling applications requiring this specific diameter. Engineered for fast and efficient drilling in brickwork, concrete and breeze block with cordless drills, this bit drills up to 60% faster than competitive drill bits. The single flute design ensures faster dust removal for increased drilling speed even at extended depths, whilst the unique pressed diamond-ground carbide tip allows for aggressive cutting action. The carbide tip design ensures 20% longer life compared to previous Irwin masonry drill bits. The chrome vanadium body with high carbon content allows more hardening, creating a stronger bit with maximum rupture strength for demanding applications. Features and Benefits: • 5.5mm diameter with 160mm length for extended reach drilling • Perfect for deeper applications through cavity walls and thick masonry • Up to 60% faster drilling performance than competitive alternatives • Single flute design maintains efficient dust removal at depth • Pressed diamond-ground carbide tip for aggressive cutting • 20% longer life compared to previous Irwin masonry bits • High carbon chrome vanadium body for maximum strength Specifications: Diameter (mm): 5.5 Working Length (mm): 160 Overall Length (mm): 115 Pack Qty.: 1 Total length: 160mm.