Dual-color bits are coated twice for added thickness and extended durability, allowing these bits to drill through hard material such as stainless steel or chrome nickel at a faster rate and leave a cleaner bore than HSS or titanium-coated bits. Key Specs Includes (qty.) 29 Bores 3/8 inch Case Included Yes Size 1/16in. through 1/2in. by 64ths Finish Type Cobalt alloy-coated Additional Specs * Precision-ground 135° split point bits offer double-rear open angle for better accuracy when drilling * 3/8in. spherical triangle shank fits most power drills