Bosch Expert Self Cut Speed spade drill bit set for use in softwoods, chipboard or particleboard. Features a self-feeding threaded tip offering high-speed wood drilling with minimal pressure needed. Wave-shaped spade drill bit design delivers fast chip removal. Ideal for drilling upside down or in tight spaces. 1/4impact-rated hex shank provides maximum power transfer in standard 3-jaw drills and hexagonal screwdriver chucks. Suitable for Natural Hardwood & Softwood, Plywood, Chipboard & Hardboard 10-32mm Dia. Drill Bits High-Speed Steel Self-Feeding Threaded Tip For Use with 3-Jaw & 1/4" Hex Chuck Machines on Rotary Action Wave-Shaped Spade Design Suitable for Natural Hardwood & Softwood, Plywood, Chipboard & Hardboard 10-32mm Dia. Drill Bits High-Speed Steel Self-Feeding Threaded Tip For Use with 3-Jaw & 1/4" Hex Chuck Machines on Rotary Action Wave-Shaped Spade Design