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Irwin 13/16" - 1-3/8" Unibit Fractional Stepdrill

Irwin 10221
SKU IRW-10221
Irwin 13/16" - 1-3/8" Unibit Fractional Stepdrill

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A single-fluted cutting edge of this fractional step drill assures true round holes, and allows greater control with less vibration. It is ideal for drilling holes in thin materials such as mild steel, copper, brass, aluminum, plexiglass, wood, and laminates.

  • Cutting Diameter: 13/16 in [Min], 1 3/8 in [Max].
  • Cutting Edge Material: HSS.
  • Material Thickness: 1/8 in [Max].
  • Measurement Type: Fractional.
  • No. of Steps: 10.
  • Packing Type: Carded.
  • Shank Diameter: 1/2 in.

Similar Drill Bit Products

Irwin 10221 Description

A single-fluted cutting edge of this fractional step drill assures true round holes, and allows greater control with less vibration. It is ideal for drilling holes in thin materials such as mild steel, copper, brass, aluminum, plexiglass, wood, and laminates.

  • Cutting Diameter: 13/16 in [Min], 1 3/8 in [Max].
  • Cutting Edge Material: HSS.
  • Material Thickness: 1/8 in [Max].
  • Measurement Type: Fractional.
  • No. of Steps: 10.
  • Packing Type: Carded.
  • Shank Diameter: 1/2 in.

Similar Drill Bit Products

$92.57Each
In Stock-

Ships between 03/18/2026 - 03/20/2026

Country of Origin

Made in the U.S.A.
This item is proudly made in the United States of America.

Irwin
Visit The Irwin Store
See more Irwin Vise-Grip Step Drills

Product Specifications

Part Number10221, 585-10221
Country of OriginUSA
Weight0.52-lb
UPC038548102214

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

13/16" - 1-3/8" Unibit Stepdrill

  • New SpeedPoint tip provides 6X faster initial penetration time than before and eliminates the need for center punching. Single-fluted cutting edge assures true round holes and allows greater control with less vibration. Ideal for drilling holes in thin m
  • Cutting Diam: 13/16 in Min 1 3/8 in Max
  • Packing Type: Carded
  • Weight: 0.66 lb
Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
Irwin 13/16" - 1-3/8" Unibit Fractional Stepdrill
$92.57Each
In Stock-

Ships between 03/18/2026 - 03/20/2026

Country of Origin

Made in the U.S.A.
This item is proudly made in the United States of America.

Similar Drill Bit Products

Irwin 10221 Description

A single-fluted cutting edge of this fractional step drill assures true round holes, and allows greater control with less vibration. It is ideal for drilling holes in thin materials such as mild steel, copper, brass, aluminum, plexiglass, wood, and laminates.

  • Cutting Diameter: 13/16 in [Min], 1 3/8 in [Max].
  • Cutting Edge Material: HSS.
  • Material Thickness: 1/8 in [Max].
  • Measurement Type: Fractional.
  • No. of Steps: 10.
  • Packing Type: Carded.
  • Shank Diameter: 1/2 in.

Product Specifications

Irwin
Visit The Irwin Store
Part Number10221, 585-10221
Country of OriginUSA
Weight0.52-lb
UPC038548102214

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

13/16" - 1-3/8" Unibit Stepdrill

  • New SpeedPoint tip provides 6X faster initial penetration time than before and eliminates the need for center punching. Single-fluted cutting edge assures true round holes and allows greater control with less vibration. Ideal for drilling holes in thin m
  • Cutting Diam: 13/16 in Min 1 3/8 in Max
  • Packing Type: Carded
  • Weight: 0.66 lb
Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.

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