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Irwin Store

irwin Store

IRWIN TOOLS manufactures and distributes professional grade hand tools for professionals who demand superior performance and durability on the job. See our full line of UNIBIT step drills and countersinks as well as aviation snips and Sharpie markers.


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Unibit Step Drill, #1

Unibit Step Drill, #1

  • 1/8 inch - 1/2 inch hole sizes
  • Single flute design works great in thin materials
  • HSS construction
Product Details »
Price: $29.49
Sale Price: $23.60
Unibit Step Drill, TiN Coated, #1T

Unibit Step Drill, TiN Coated, #1T

  • 1/8 inch - 1/2 inch hole sizes
  • Single flute design works great in thin materials
  • TiN coated HSS construction
Product Details »
Price: $39.30
Sale Price: $31.44
Unibit Step Drill, #2

Unibit Step Drill, #2

  • 3/16 inch - 1/2 inch hole sizes
  • Single flute design works great in thin materials
  • HSS construction
Product Details »
Price: $29.49
Sale Price: $23.60
Unibit Step Drill, #20

Unibit Step Drill, #20

  • 9/16 inch - 1 inch hole enlarging
  • Single flute design works great in thin materials
  • HSS construction
Product Details »
Price: $60.76
Sale Price: $48.61
Unibit Step Drill, #21

Unibit Step Drill, #21

  • 13/16 inch - 1-3/8 inch hole enlarging
  • Single flute design works great in thin materials
  • HSS construction
Product Details »
Price: $134.82
Sale Price: $107.86
Unibit Step Drill, TiN Coated, #2T

Unibit Step Drill, TiN Coated, #2T

  • 3/16 inch - 1/2 inch hole sizes
  • Single flute design works great in thin materials
  • TiN coated HSS construction
Product Details »
Price: $39.30
Sale Price: $31.44
Unibit Step Drill, #3

Unibit Step Drill, #3

  • 1/4 inch - 3/4 inch hole sizes
  • Single flute design works great in thin materials
  • HSS construction
Product Details »
Price: $53.16
Sale Price: $42.53
Unibit Step Drill, TiN Coated, #3T

Unibit Step Drill, TiN Coated, #3T

  • 1/4 inch - 3/4 inch hole sizes
  • Single flute design works great in thin materials
  • TiN coated HSS construction
Product Details »
Price: $56.68
Sale Price: $45.35
Unibit Step Drill, #4

Unibit Step Drill, #4

  • 3/16 inch - 7/8 inch hole sizes
  • Single flute design works great in thin materials
  • HSS construction
Product Details »
Price: $63.80
Sale Price: $51.04
Unibit Step Drill, TiN Coated, #4T

Unibit Step Drill, TiN Coated, #4T

  • 3/16 inch - 7/8 inch hole sizes
  • Single flute design works great in thin materials
  • TiN coated HSS construction
Product Details »
Price: $67.00
Sale Price: $53.60
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