TEKTON 7303 13-Pc. Titanium Drill Bit Set features: Titanium Coating Provides Bits with 4 to 5 Times Longer Life Span Than Conventional High Speed Steel, Multi-Purpose Use for Wood, Plastic, and Metal, Bits Can Drill Through Harder Alloys and Withstand Higher Temperatures, Titanium Bits Require Less Pressure to Penetrate Tough Materials, Coating Resists Abrasion and Corrosion, 135 degree Split Points Penetrate on Contact and Reduce Skating and Walking, Complete with Metal Index Box, 13-pc. Drill Bit: 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", Complete with Metal Index Case