The Bosch EXPERT Self Cut Speed Flat Drill Bit in 18mm diameter with a 400mm length is well matched to 15mm copper pipe installations and similar plumbing first-fix tasks in softwood. Bosch Tip Technology's self-feeding screw tip pulls the bit in with minimal pressure, while the wave-shaped paddle design ensures rapid cutting and chip clearance. Fits directly into any impact driver or drill driver via the 1/4" impact-rated hex shank. Up to 3x faster than the standard Bosch spade bit. Features and Benefits: • Up to 3x faster than standard Bosch spade bits • Self-feeding screw tip for low-pressure drilling • Wave-shaped spade for fast cutting and chip removal • 1/4" impact-rated hex shank Specifications: Diameter: 18mm Length: 400mm