The 110-Piece Shank Screwdriver Bit Set is suitable for DIY projects around the house as well as for general construction work. The accessories are made with S2-modifed and heat-treated steel which ensures product longevity and maximizes torque. Their full hex design maximizes bit tip strength while the optimized fastener fitments minimize cam-out. You'll be using these bits for various applications over the years. TOUGH GRIP screwdriver and drill bits aside, this set comes in a connectible ToughCase+ system. These storage cases keep your screwdriver accessories organized and maximize your storage space