Evolution Power Tools Straight Flute Step Drill 1/4 In. to 1 3/8 In. SD 11

SD-11: (11 Hole Sizes) Two Flutes 3/8″ Shank

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″

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.

Evolution Premium Step Drills are used to produce a range of hole sizes in steel up to 1/8″ thick using only one tool. The twin flute design allows for a smoother cutting action with no pre-drilling necessary. Evolution Premium Step Drills have 3 chucking flats on the driving shank to ensure no slipping in the chuck.