Evolution Power Tools * | Evolution Power Tools Straight Flute Step Drill 1/4 In. To 1 3/8 In. Sd 11 Free Delivery

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.

Specifications

Diameters: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