Bosch Daredevil spade bits deliver the fastest drilling performance possible through wood, up to 10X faster than conventional spade bits. The bit as a full-cone threaded tip that pulls it through the wood, offering best-in-class speed through 2x4s. Ideal for clean-boring a lot of holes through wood fast to run conduit or pipe, these bits deliver a drilling speed and a force performance that sets them apart; these are not bits for counter sinking or dowling. The spur-and-reamer feature on each Daredevil spade bit clears chips better, for a cleaner hole. The contoured paddle design also helps with chip removal, contributing to the fast performance. The hex shank with power groove reduces bit slippage in the drill and makes it suitable for use with a variety of drill types, including impact drills. Do not use in drill press.