Bosch 37 Piece Bit Holder Screwdriver and Bit Set

The Bosch 37 Piece Bit Holder Screwdriver and Bit Set is an extra hard screwdriver bit set designed for driving screws with drill drivers. Modern drill drivers deliver high torque that can break standard screwdriver bits. These Extra Hard Screwdriver Bits are made from heat-treated S2 modified steel for hardness and durability, so they can cope with the demands of high-torque screwdriving. The set includes a bit holder and 37 pieces in total, with 75 mm bits covering PH, PZ, T, SL and hex (H) sizes, plus R, TQ, TW and U sizes. The hex shank gives a strong connection in three-jaw chucks and ¼" internal hex tool holders. Please note that these bits are not suitable for use with impact drivers.