DEWALT Screwdriver Bit set is engineered for the toughest drilling tasks, with two high-performance bits designed to handle drywall and masonry materials, as well as ToughCase storage. The extended FLEXTORQ design reduces cam-out while the CNC-machined bit tip gives you a precise fit in screw heads and transfers optimal torque.CNC-machined bit tip for a precise fit in screw heads for reducing cam-outExtended FLEXTORQ Torsion Zone* transfers optimal torqueToughCase Storage system allows for interconnecting sets to be connected for a site-ready storage system