Evolution offer a range of premium multiple step drills which offer fantastic value for money.
Evolution premium step drills are made from the same high quality material as the Cyclone premium Annular Cutter. Tempered tough at 68 RC means more holes cut per sharpen. 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 Jacobs Chuck. Each hole size is laser etched for clarity. Evolution drills are the best value step drill on the market today. Evolution Premium Step Drills are used with portable hand drills to produce a choice of several hole sizes in steel up to 1/8 thick using only one drill bit.
Evolution Premium Step Drills are available in the following number of hole making steps.
| Part No. | Hole Sizes |
| SD-6 | Creates 6 hole sizes from 3/16” - 1/2” in 1/32” increments |
| SD-9 | Creates 9 hole sizes from 1/4” - 3/4” in 1/16” increments |
| SD-10 | Creates 10 hole sizes from 1/4” - 1” in 1/16” increments |
| SD-11 | Creates 11 hole sizes from 1/4” - 1-3/8” in 1/8” increments |
| SD-12 | Creates 12 hole sizes from 3/16” - 7/8” in 1/16” increments |
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