IRWIN Unibit1T Shank Step Drill Bit, Titanium Nitride Coated, 1/8" to 1/2" by 1/4" (15101)

Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates | Single-flute cutting edge for greater control through steps | 3 faltted shank prevents slipping in drill chuck | New speedpoint tip penetrates faster than previous unibits and prevents walkingAmazon.ca Product Description Step Drill Bit, Material HSS, Titanium Nitride Coated Finish, Number of Hole Sizes 13, Shank Size 1/4 In., Step Thickness 1/32 In., Size Range 1/8 In. to 1/2 In., Sizes Included 1/8 In., 5/32 In., 3/16 In., 7/32 In., 1/4 In., 9/32 In., 5/16 In., 11/32 In., 3/8 In., 13/32 In., 7/16 In., 15/32 In., 1/2 In., Number of Flutes 1, Shank Type Hex, Bit Length 3-1/8 In. From the Manufacturer UNIBIT 1T 13 Hole Sizes (1/8"-1/2"), 1/32" Increments