Irwin Tools 4935642 Black Oxide Hex Shank Drill Bit, 1/16-Inch Contents: 3/32, 7/64, 1/8, 9/64 and 5/32-Inch drill bits 135-Degree split-point tip starts drilling immediately and eliminates walking Manufactured with premium high speed steel with black oxide coating for corrosion resistance 1/4-Inch hex shank works in all Lock-n-Load quick-change extensions as well as all drill chucks