Step Drills, Counter-sinks

Step drills are a great way to make precise and quick holes in thin sheet metal, aluminum, plastic or a variety of materials. If you have ever experienced distorted panels or oblong holes in your metal, this is one way to do it right without needing a whole set of bits.

Countersinks are useful in many ways, from deburring and finishing machined or drilled holes to utilizing flush fasteners for that smooth look.


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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

  • 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

  • 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

  • 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

  • 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, #21T

  • 13/16 inch - 1-3/8 inch hole enlarging
  • Single flute design works great in thin materials
  • TiN coated HSS construction
Product Details »
Price: $179.78
Sale Price: $143.83

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

  • 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

  • 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

  • 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
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