Irwin Unibit Cobalt Step Drill Sets, 1/8 in to 3/4 in Cutting Dia

6x longer life. Three-flatted shank. Speedpoint tip. Laser marked sizes.

Attributes:

Applicable Materials = Aluminum; Brass; Copper; Laminate; Mild Steel; Wood, Cutter Diam [Max] = 3/4 in, Cutter Diam [Min] = 1/8 in, Cutting Edge Material = HSS, Height [Nom] = 1 5/8 in, Includes = #1 Step Drill; #2 Step Drill; #3 Step Drill, Length [Nom] = 7 3/4 in, Measurement Type = Inch, No. of Flutes = 1, Quantity = 3 Pieces, Shank Diam [Nom] = 1/4 in; 3/4 in, Shank Type = Hex, Tool Shape = Tree-Step Drill, Type = Step Drill Set, Width [Nom] = 5 1/2 in, Wt. = 0.42 lb. (1 EACH = 1 EACH)