General description The Bosch EXPERT Self Cut Speed Spade Drill Bit Set includes 7 pieces designed for high-speed drilling in wood. This set is ideal for professionals needing to create holes for cables, pipes, and other hardware installations, offering efficiency and convenience. Technical specifications Includes 6 x EXPERT Self Cut Speed Spade Drill Bits: 16 x 152mm, 18 x 152mm, 20 x 152mm, 22 x 152mm, 25 x 152mm, 32 x 152mm 1 x EXPERT Self Cut Speed Spade Drill Extension Bar 1 x Hex Key Fitted with a 1/4in impact rated Hex shank Usage Fast drilling with Bosch Tip Technology Self-feeding thread for high-speed drilling with minimal pressure Clever wave-shaped spade design for fast chip removal Suitable for all types of softwood Ideal for electricians and installation/building workers