No-skate tip for clean and accurate starts Titanium coating generates less friction for 2x longer life Three-flat shank promotes better grip on bits 3/16 in. And larger Universal drilling applications designed for general-purpose use High visibility marking provide clearly marked diameter Included bit sizes: (1) 1/16", (1) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 3/16", (1) 7/32", (1) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"