SD-10: (10 Hole Sizes) Two Flutes 3/8″ Shank 1/4″, 13/32″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″, 15/16″, 1″ 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. Evoluti
Evolution SD-10: 1/4 – 1 in. Straight Flute Step Drill
Original price was: $46.00.$13.80Current price is: $13.80.













