Dewalt DD5160 Impact Ready 10 piece 1/4" Hex Shank Titanium Coated Metal Drill Bits with Pilot Point. Set includes (2) 1/8", (1) 9/64", 5/32", 11/64", 3/16", 7/32", 1/4", 5/16", 3/8" and a Tough Case. (Pilot Point on 3/16" and larger sizes).
For best results with any cutting tool always use a cutting fluid or lubricant whenever possible. Always clamp or secure in place the item being drilled, unsecured small or light parts can spin violently while being drilled, causing injury. Always wear ANSI/CSA approved protective eyewear when using any tool.