This bosch expert cyl-9 multi construction drill bit is supplied as a pack of 8 bits, each with a 10mm diameter and 120mm overall length. The 10mm size is ideal for larger fixings, heavy-duty anchors and demanding applications across tough substrates including granite, concrete, brick, soft tile, wood and metal and the multi-pack format keeps you supplied for extended site use. Delivering up to 5x more precision than the bosch cyl-3, each bit is built from fine-ground optimised carbide for lasting sharpness and durability. Bosch centering geometry delivers a reliable, slip-free start, while the precision centring tip keeps every hole accurate and on target. The optimised dust extraction channel ensures efficient chip clearance for consistently fast drilling. Features and benefits: up to 5x more precise than bosch cyl-3 for professional-grade accuracy bosch centering geometry for a slip-free start and stabilised action precision centring tip for accurate, repeatable hole placement fine-ground high-performance carbide tip for razor-sharp, durable edges optimised dust extraction channel for efficient chip removal and faster drilling cylindrical shank compatible with three-jaw drill chucks specifications: diameter: 10mm length: 120mm pack quantity: 8 contents: pack of 8