Each bit is ground from a solid 1-piece design and is up to 5 times more durable than the current conventional product. Pilot Point tip on the 3/16" to 1/2" bits allows the user to drill holes faster with clean, burr-free holes. The Pilot Point design also helps to reduce any bit walking. High speed steel with titanium finish. Set includes 1/8" 9/64", 5/32", 11/64", 3/16", 7/32", 1/4", 5/16", and 3/8" drill bits, and a plastic carrying case.