IRWIN / Stanley Black & Decker - 10220CB - Step Drill Bit, Cobalt, Black Oxide, 9/16 in to 1 in Size Range, Straight with Three Flats

  • MFR SKU: 10220CB
  • ITEM #: 1777837
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ITEM #: 1777837
The shanks on these step drill bits have three flats that help prevent the bits from slipping in the drill chuck during drilling. These cone-shaped bits have steps of increasing diameter marked along their cutting head. As each bit is pushed into a piece of sheet metal or other thin material, each step on the bit widens the hole. The bits also have a self-starting split point that prevents the bits from moving, or walking, when starting to drill, which eliminates the need for using a center drill...
ITEM #: 1777837
The shanks on these step drill bits have three flats that help prevent the bits from slipping in the drill chuck during drilling. These cone-shaped bits have steps of increasing diameter marked along their cutting head. As each bit is pushed into a piece of sheet metal or other thin material, each step on the bit widens the hole. The bits also have a self-starting split point that prevents the bits from moving, or walking, when starting to drill, which eliminates the need for using a center drill to create a starter hole before drilling.
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IRWIN / Stanley Black & Decker - 10220CB - Step Drill Bit, Cobalt, Black Oxide, 9/16 in to 1 in Size Range, Straight with Three Flats

  • Item #: 1777837
  • MFR SKU: 10220CB
Technical Specs
  • Application Steel, Stainless Steel, Aluminum, Brass, Copper, Laminates, Plastic, Wood
  • Drill Size 9/16" - 1"
  • Finish Bright
  • Material High Speed Steel
  • Maximum Material Thickness 1/8"
  • Number of Flutes 1
  • Number of Holes 8
  • Overall Length 2-1/2"
  • Point Needs Pilot Hole
  • Series UNIBIT174
  • Shank Size 7/16"
  • Style Hole Enlarging
  • Trade Name UNIBIT
  • Type Step Drill Bit
  • Product Weight 0.3125
  • Catalog Page BBV11, Page 07-26
  • Notes
  • This IRWIN Unibit #20 Cobalt Step Drill Bit is engineered with M-35-grade cobalt steel for maximum life when drilling in tough steel. Laser-marked sizes enable easy reading. The radial concave flute design helps ensure an effective use of drilling power.
  • 6x Longer life vs the competition
  • M35 grade Cobalt HSS
  • Radial concave flute
  • Speedpoint tip
  • Laser marked sizes
  • Drilling into thin metal.
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