Combination set of both drill and screwdriver bits. Includes bits suitable for drilling in metal, wood, plastic and masonry along with all the most common screwdriver sizes. DeWalt high speed steel drill bit set comes with 100 pieces and can be used with general purpose drilling and screwdriving. All pieces are compatible with hand braces & power drills, and organised in a carry case. Features For Use with 3-Jaw Chuck Machines on Rotary & Impact Modes Holds Bits Securely Magnetic Bit Holder Tough Plastic Storage CaseCombination set of both drill and screwdriver bits Includes bits suitable for drilling in metal, wood, plastic and masonry Contains most sized bits for screwdrivers Tough plastic storage case Holds bits securely It has various shank sizes Benefits SUITABLE FOR MULTIPLE MATERIALS: Masonry, Plastic, Metal & Wood SECURE STORAGE: Holds bits magnetically inside a high-quaity case DURABLE DRILL BITS: Optimised bit design for long life and durability in drilling and screw driving