The kwb Industrial Steel Bit Box includes 30 bits made from TQ60 steel with a 1/4" hex shank, a square adapter for socket wrenches, and a magnetic quick-change bit holder with a 1/4" hex shank for cordless drills. TQ60 steel is characterized by its exceptional hardness combined with flexibility, making the bits very durable even under heavy use. To prevent rust formation, the bits have a shiny nickel-plated surface finish. Color-coded rings help distinguish between the different bit types. Ridges on the bit tip provide better grip and prevent slipping off the screw. The rubberized storage compartment keeps the individual bits organized and securely held in the box. The patented design bit box made of sturdy plastic features a soft-touch color edge for better grip and includes a practical belt clip. The bit set is suitable for the most common screwing tasks.