Warrior 3 Pc Titanium Step Drill Bits Set 1/8 to 3/4 Inch Tri-Flat Shank 91616 Warrior Titanium Step Drill Bit Set provides a versatile solution for drilling through steel, copper, brass, aluminum, and plastic. This 3-piece set features cool-running titanium nitride coating for increased longevity. Designed with a two-flute pattern for faster cutting, these bits automatically deburr holes. Each bit has a tri-flat shank to prevent slipping and works with corded or cordless drills. Includes a 6-step bit (3/16"-1/2"), a 9-step bit (1/4"-3/4"), and a 13-step bit (1/8"-1/2"). Measurements: • Hole Sizes: 1/8" - 3/4" • 6 Step Bit: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" • 9 Step Bit: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" • 13 Step Bit: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" #Utility