HomElectrical.com Lighting & Electrical Supply Superstore

Irwin 7/8" - 1-1/8" Unibit Fractional Step drill

Irwin 10239
SKU IRW-10239
Irwin 7/8" - 1-1/8" Unibit Fractional Step drill

Image may not depict product actual color, inclusions or accessories

Penetrate holes faster than previous unibits with this fractional step drill. This unibit step drill bit is Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates.

  • No. of Steps: 2.
  • Shank Diam: 1/8 in.
  • Packing Type: Carded.
  • Cutting Edge Material: HSS.
  • Measurement Type: Fractional.
  • Material Thickness: 1/8 in [Max].
  • Cutting Diam: 7/8 in [Min], 1 1/8 in [Max].

Similar Drill Bit Products

Irwin 10239 Description

Penetrate holes faster than previous unibits with this fractional step drill. This unibit step drill bit is Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates.

  • No. of Steps: 2.
  • Shank Diam: 1/8 in.
  • Packing Type: Carded.
  • Cutting Edge Material: HSS.
  • Measurement Type: Fractional.
  • Material Thickness: 1/8 in [Max].
  • Cutting Diam: 7/8 in [Min], 1 1/8 in [Max].

Similar Drill Bit Products

$63.21Each
In Stock-

Ships between 02/27/2026 - 03/02/2026

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

Product Specifications

Part Number10239, 585-10239
Weight0.45-lb
UPC385481023999

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

7/8" - 1-1/8" 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: 7/8 in Min 1 1/8 in Max
  • Packing Type: Carded
  • Weight: 0.51 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 7/8" - 1-1/8" Unibit Fractional Step drill
$63.21Each
In Stock-

Ships between 02/27/2026 - 03/02/2026

Similar Drill Bit Products

Irwin 10239 Description

Penetrate holes faster than previous unibits with this fractional step drill. This unibit step drill bit is Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates.

  • No. of Steps: 2.
  • Shank Diam: 1/8 in.
  • Packing Type: Carded.
  • Cutting Edge Material: HSS.
  • Measurement Type: Fractional.
  • Material Thickness: 1/8 in [Max].
  • Cutting Diam: 7/8 in [Min], 1 1/8 in [Max].

Product Specifications

Irwin
Visit The Irwin Store
Part Number10239, 585-10239
Weight0.45-lb
UPC385481023999

Shop Top 100 Tools & Hardware Products.

View other Drill Bit Best Sellers.

Manufacturer Description

7/8" - 1-1/8" 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: 7/8 in Min 1 1/8 in Max
  • Packing Type: Carded
  • Weight: 0.51 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.

Product Questions & Answers

Customer Reviews

Your voice matters. Be the first to leave a review and help other pros shop smarter

Write A Review
Need Assistance?

Never Stop Saving!

With HomElectrical, you are not just buying a product, you are investing in a solution. Our goal is to help you make the most educated choice possible, ensuring maximum savings on every job. We provide the deep product knowledge for all your Electrical, HVAC, and Lighting projects. By promoting efficiency and supporting every purchase with high-quality service, we help save your business money and support a greener future.