The DT70761 72 Piece drill bit set is part of the Dewalt modular Toughcase accessory range. They are stored in a Medium Connectable Tough Case compatible with the TSTAK System via the Large Tough Case. The Dewalt DT70761 Set consists of 28 Drills, 42 Screwdriver Bits and 2 Holders The DEWALT ToughCase+ Accessory Storage solutions have premium features to help keep drilling and fastening bits organized. The system includes four container sizes; the Small Bulk Storage Container, Small ToughCase�+ Container, Medium ToughCase�+ Container, and Large ToughCase�+ Container for unlimited configurations. The ToughCase�+ Containers feature newly-designed bit storage, with a unique bit bar position that allows for easy removal of bits. Clear lids let users see what's in the case at a glance. In addition, the Small, Medium and Large ToughCase�+ Containers include a proprietary latch system to connect to each other for optimized storage space. The Small Bulk Storage Container fits into each of the units as well, and helps loose materials stay organized. Features Medium Tough Case System Set Connectable Case allows multiple sets to be stacked and locked together TSTAK compatible to hold all your accessory sets in one place Compatible with the TSTAK system via the Large Tough Case Extreme Masonry drill bits have a hardened steel body and core reinforcement for maximum strength combined with high drilling speeds in concrete and masonry Anti-slip shank - 3 milled clamping surfaces prevent rotation of the drill bit in the chuck Masonry drill bits are typically used for drilling anchor, plastic plug, fixing and pipework clearance holes Metal drill bits are made from high speed steel for wear resistance and longer life Metal drill bits are designed with a precision ground twist for fast drilling, long life and excellent concentricity Screwdriver bits have an Optimised Tip Geometry for full fitment in the fastener and reduced cam-out Full-fit