The DieHard 14-Piece Hex Drill Bit Set includes drill bits with a titanium coating that reduces and extends bit life. Versatile and durable, these bits are strong enough for drilling into wood, metal and plastic. The 14 PC set includes a 1 /4" hex shank for increased compatibility. DieHard tools are reliable, durable and powerful, which means they are built to work as hard as you do. They include a full line of hand tools, sets, power tools and jacks and lifts that exceed ANSI/ASME standards and are excellent for a wide range of automotive repairs. DieHard hand tools also include a lifetime warranty. You can depend on DieHard tools to get the job done right and expand what you're able to do from your garage or driveway. For your automotive projects, big and small, get tools so reliable they are DieHard.