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Irwin 1/4" - 3/4" Unibit Titanium Nitride Coated Stepdrill

Irwin 15103ZR
SKU IRW-15103
Irwin 1/4" - 3/4" Unibit Titanium Nitride Coated Stepdrill

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The titanium Nitride finish of this strep drill bit causes less friction which increases speed and increases product life by 6 times. Its single-fluted cutting edge assures true round holes, and allows greater control with less vibration.

  • Cutting Diameter: 1/4 in [Min], 3/4 in [Max].
  • Brand Name: Unibit.
  • Cutting Edge Material: HSS.
  • Finish: TiN.
  • Material Thickness: 3/8 in [Max].
  • Measurement Type: Fractional.
  • No. of Steps: 9.
  • Packing Type: Carded.
  • Shank Diameter: 3/8 in.
  • Tool Shape: Tree - Step Drill.
  • Type: Step Drill Bit.

Similar Drill Bit Products

Irwin 15103ZR Description

The titanium Nitride finish of this strep drill bit causes less friction which increases speed and increases product life by 6 times. Its single-fluted cutting edge assures true round holes, and allows greater control with less vibration.

  • Cutting Diameter: 1/4 in [Min], 3/4 in [Max].
  • Brand Name: Unibit.
  • Cutting Edge Material: HSS.
  • Finish: TiN.
  • Material Thickness: 3/8 in [Max].
  • Measurement Type: Fractional.
  • No. of Steps: 9.
  • Packing Type: Carded.
  • Shank Diameter: 3/8 in.
  • Tool Shape: Tree - Step Drill.
  • Type: Step Drill Bit.

Similar Drill Bit Products

$53.17Each
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 Number15103ZR, 585-15103ZR
Country of OriginUSA
Weight2.41-lb
UPC038548151038

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

1/4" - 3/4" Unibit Titanium Nitride Coated Stepdrill

  • Titanium Nitride finish causes less friction which increases speed and increases product life by 6X. New SpeedPoint tip provides 6X faster initial penetration time than before and eliminates the need for center punching. Single-fluted cutting edge assures
  • Cutting Diam: 1/4 in Min 3/4 in Max
  • Finish: TiN
  • Packing Type: Carded
  • Type: Step Drill Bit
  • Weight: 2.41 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 1/4" - 3/4" Unibit Titanium Nitride Coated Stepdrill
$53.17Each
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 15103ZR Description

The titanium Nitride finish of this strep drill bit causes less friction which increases speed and increases product life by 6 times. Its single-fluted cutting edge assures true round holes, and allows greater control with less vibration.

  • Cutting Diameter: 1/4 in [Min], 3/4 in [Max].
  • Brand Name: Unibit.
  • Cutting Edge Material: HSS.
  • Finish: TiN.
  • Material Thickness: 3/8 in [Max].
  • Measurement Type: Fractional.
  • No. of Steps: 9.
  • Packing Type: Carded.
  • Shank Diameter: 3/8 in.
  • Tool Shape: Tree - Step Drill.
  • Type: Step Drill Bit.

Product Specifications

Irwin
Visit The Irwin Store
Part Number15103ZR, 585-15103ZR
Country of OriginUSA
Weight2.41-lb
UPC038548151038

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

1/4" - 3/4" Unibit Titanium Nitride Coated Stepdrill

  • Titanium Nitride finish causes less friction which increases speed and increases product life by 6X. New SpeedPoint tip provides 6X faster initial penetration time than before and eliminates the need for center punching. Single-fluted cutting edge assures
  • Cutting Diam: 1/4 in Min 3/4 in Max
  • Finish: TiN
  • Packing Type: Carded
  • Type: Step Drill Bit
  • Weight: 2.41 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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