Impact Ready Step Drill Bit Set Shank Size 1/4 In. Number of Hole Sizes 13 6 12 Step Thickness 5/32 In. 3/8 In. Number of Flutes 2 Number of Pieces 3 Shank Type Hex Point Angle 135 Degrees Bit Length 3.4 In. Material Titanium Titanium Finish Design Two Flute Spiral Max Speed 2850 rpm