Bosch Driven Impact Screwdriving/Drilling Case Set, 40PC is designed for durability and performance, featuring a torsion zone built to last and providing 50 times the bit life d to standard bits. This set includes impact-rated bits that fit 1/4 inch hex impact drivers, with precision-milled tips that ensure a tighter fit and reduce cam-out for more efficient screwdriving and drilling. The comprehensive 40-piece kit contains a variety of insert bits, power bits, and black oxide drill bits suitable for multiple applications, along with a standard bit holder for convenience and organization. Model Number: DDMSD40 CM