Evolution Step Drills
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.
| Step Drills | Hole Sizes | Flutes | Diameters | Part Number |
|---|---|---|---|---|
 |
Creates 6 Hole Sizes From 3/16” - 1/2in. | Two Flutes 1/4" Shank | Diameters: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | SD-6 |
 |
Creates 9 Hole Sizes From 1/4” - 3/4" | Two Flutes 3/8" Shank | Diameters: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" | SD-9 |
 |
Creates 10 Hole Sizes From 1/4” - 1in. | Two Flutes 3/8" Shank | Diameters: 1/4", 13/32", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | SD-10 |
 |
Creates 11 Hole Sizes From 1/4” - 1-3/8in. | Two Flutes 3/8" Shank | Diameters: 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" | SD-11 |
 |
Creates 12 Hole Sizes From 3/16” - 7/8in. | Two Flutes 3/8" Shank | Diameters: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" | SD-12 |
