DESCRIPTION: 5.5mm drill bit. EXTREME SDS plus four cutter concrete drill bits feature a solid 2 cutter carbide head, flanked by two individual cutting tips. This delivers a fast and efficient drilling speed in concrete. The four flute spiral enables quick debris removal maintaining fast drilling speeds. Suitable for fast drilling of plug, anchor or clearance holes in masonry, stone, concrete and brick/block work. Optimized mounting shank provides perfect grip and optimum power transmission, with a hardened steel body for extra strength and reduced breakage. Solid two cutter head is flanked by two individual cutting tips delivering a fast and efficient drilling speed. The 140? tip design ensures better bit penetration and longer life. Hardened Steel body for extra strength and reduced breakage. SPECIFICATION: Product Length [Imperial]: 1 in. Working Length [Metric]: 400 mm. Product Weight [Metric]: 1 Kg. Product Height [Imperial]: 1 in. Product Height [Metric]: 1 cm.