With a hardness of 58-62HRC, this 40 piece Impact Driver Bit Set is suitable for workshop and manufacturing use. Made from chrome molybdenum the range includes Hexagon, TX and Spline bits with 3/8" and 1/2" x 10mm Bit Adaptors that are suitable for hand and power impact drivers. Supplied in a plastic carry case. Features and Benefits • Bits are manufactured from chrome molybdenum for durability • Suited for use with hand and power impact drivers for versatility • Comprehensive kit includes the most used bits to ensure you always have the right accessory to hand • Supplied in a heavy-duty plastic case for easy storage, organisation and transportation Typical Applications • Workshops • Automotive • Engineering