Irwin Unibit Step Drill Sets, HSS #1,#2, #4, #21

Single-flute cutting edge for greater control through steps. Three flatted shank prevents slipping in drill chuck. Non-skid self-starting tip eliminates skidding and the need for center punching.

Attributes:

Applicable Materials = "Stainless Steel; Copper; Brass; Aluminum; Plastic; Laminates", Cutting Edge Material = HSS, Includes = HSS #1 Bit; HSS #2 Bit; HSS #4 Bit; HSS #21 Bit, Quantity = 4 per set, Type = Step Drill Set, Wt. = 1.2 lb. (1 SET = 1 SET)