CRAFTSMAN Drill Bit Set, 47 Pieces (CMAF1247) The CRAFTSMAN 47-Piece screw driving set bits are engineered with shock-resistant tool steel to provide maximum durability. The cnc-machined bit tip ensures a precise fit in each screw Recess, helping to reduce wear, stripping and cam-out. Features Constructed with shock-resistant tool steel for maximum durability Cnc-machined bit tip ensures precise fit in Screw heads reducing opportunity for cam-out Compatible with the versa-track portable storage system USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.