COMOWARE 29Pcs Drill Bit Set for Metal, Black and Gold Finish, Metal Drill Bits for Steel, Twist Drill Bits for Hardened Steel, Cast Iron, Stainless Steel, 1/16" to 1/2"

This Professional Drill Bit Set features high-speed steel construction with a gold oxide finish, resulting in increased hardness and corrosion resistance.

These attributes make the drill bits suitable for use on hardened worki