Evolution SD-11 Step Drill with Straight Flute, 1/4" To 1-3/8" Hole Sizes

Evolution Premium Step Drills are made from the same high-quality M2AL as Cyclone Premium Annular Cutters. These tools are heat treated to 68RC, giving them more durability during tough applications.

• Versatile tools for producing a range of hole sizes in steel up to 1/8" thick
• Allows for hole creation using a single tool, eliminating the need for multiple drill bits
• Twin Flute Design provides a smooth cutting action without the requirement of pre-drilling
• Features 3 chucking flats on the driving shank to prevent slipping in the chuck
• Number of Hole Sizes: 11
• Hole Sizes: 1/4", 25/64", 35/64", 11/16", 13/16", 7/8", 1", 1-1/8", 1-7/32", 1-1/4", 1-3/8"
• Shank Diameter: 3/8"
• Shank Type: Straight with Three Flats