Irwin 1890708 Straight Shank I...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$13.33
Irwin 1890708 Straight Shank Installer Drill Bit for Wood, 18-Inch x 5/16-Inch

Irwin 1890708 Straight Shank Installer Drill Bit for Wood, 18-Inch x 5/16-Inch

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Model: 1890708

In Stock (leaves warehouse same day if ordered before 3pm ET)

$13.33
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Irwin 1890708 Straight Shank Installer Drill Bit for Wood, 18-Inch x 5/16-Inch

The Irwin 1890708 Straight Shank Installer Drill Bit for Wood is built for electricians and installers who need to bore clean holes and pull wire through studs, joists, walls, ceilings, and floors in a single step. Sized at 18-Inch in overall length and 5/16-Inch in diameter, this bit features an 82° point for fast, smooth drilling in wood, along with a hole in the flute that makes pulling wire through the finished hole quick and convenient. Machined from premium high carbon steel and fitted with a 3-flatted straight shank, this installer bit is designed for reliable, extended service life on demanding wood-boring jobs.

Key Features

  • Trade Size: 18-Inch overall length and 5/16-Inch diameter for reaching through deep stud and joist cavities.
  • Durable Construction: Premium high carbon steel construction delivers extended drilling life in wood.
  • 82° Drill Point: Provides fast, smooth drilling performance in wood framing and other wood substrates.
  • Wire-Pull Hole: A hole in the flute allows wire to be pulled through walls, ceilings, and floors immediately after drilling.
  • 3-Flatted Straight Shank: Prevents slipping in the drill chuck and includes an additional hole for wire pulling.
  • Straight Shank Design: Compatible with standard drill chucks for use with corded and cordless drills.

Technical Specifications

  • Warranty: NLW
  • Claims Needed: No
  • Net Lit-Ion Y/N: No
  • Battery Included: No
  • Country of Origin: Brazil
  • Power Source: NON-ENERGY USING
  • Packaging: 10 ea

Typical Applications

  • Running Electrical Wire Through Wood Studs and Joists
  • Residential and Commercial Rough-In Wiring
  • Low-Voltage and Data Cable Installation
  • New Construction and Remodeling Projects
  • General Wood Boring for Trade Professionals

Why Irwin?

Irwin installer bits are machined from premium high carbon steel and finished with a 3-flatted straight shank designed to resist slipping in the chuck, giving installers a dependable tool for repeated wood-boring and wire-pulling tasks. The integrated wire-pull hole in the flute streamlines the process of running wire through framing, saving time on the jobsite. With consistent 82° point geometry for fast, smooth cuts and a shank built to hold up in the chuck, Irwin delivers a tool built for the demands of professional electrical and low-voltage installation work.

Manufacturer Resources

Product Specs

list_batch:
IRW-20260923
Product Type:
Wood Boring Bit
Configuration:
Straight Shank
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Material:
High Carbon Steel
Product Group:
Power Tools & Accessories
Power Source:
NON-ENERGY USING
Product Width:
1 in
Product Weight:
0.427 lb
Individual Vs. Set (Syndigo):
INDIVIDUAL
Battery Included:
No
Product Length:
18.9 in
Claims Needed:
No
Product Height:
1 in

Irwin 1890708 – Frequently Asked Questions

1) Will an 18-inch installer bit reach through a double stud wall or a floor assembly?
The Irwin 1890708 is 18 inches overall at 5/16 inch diameter, which covers most single and doubled 2x framing bays, top plate stacks, and typical joist or subfloor penetrations in one pass. For deeper runs through built-up headers or multiple plates you need a longer bit or an extension; the 18-inch length is the full reach on this one.
2) Can I pull wire straight through with this Irwin installer bit, or do I need a fish tape?
Wire pulls directly through the bit. There is a hole in the flute, plus an additional hole in the 3-flatted shank, so once the hole is bored you feed the conductor through the bit and draw it back through the stud, ceiling, or floor without a separate fish tape or glow rod for that bay.
3) Will this Irwin bit drill metal studs or just wood?
Wood only. The 1890708 is high carbon steel with an 82 degree point ground for wood framing and wood substrates. Hitting a steel stud or a nail plate with it will roll the cutting edges. For metal studs use a bit rated for metal.
4) Is a 5/16 inch hole big enough for the cable I'm running?
A 5/16 inch bore suits low-voltage and data cable and single small conductors, and it is the size you use when you want a minimal hole in framing. For bundled NM cable runs most electricians step up to a larger installer bit diameter. The 1890708 bores 5/16 inch only, so size the bit to the cable bundle before you drill.
5) Does this installer bit fit a standard cordless drill chuck?
Yes. It has a 3-flatted straight shank, so it clamps in any standard three-jaw keyless or keyed chuck on a corded or cordless drill, and the flats keep it from spinning in the jaws under load. No hex adapter or impact-ready holder is involved.
6) Is this a flex bit or a rigid installer bit?
Rigid. The 1890708 is a straight-shank installer bit, so it drills a straight line and does not bend around a corner or snake inside a finished wall cavity the way a flexible auger does. Use it for open framing, rough-in, and straight shots through plates and joists; for retrofit work inside a closed wall you want a flex bit.
7) How does the Irwin 1890708 come packaged for stocking?
Packaging is 10 each, which is how an electrical contractor or MRO stockroom typically buys installer bits since they get bent and dulled on framing nails. Manufacturer part number is 1890708, made in Brazil.
How fast can I get the Irwin 1890708 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Irwin 1890708 come with a warranty?
Absolutely. The Irwin 1890708 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Irwin 1890708?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Irwin 1890708 from ZenSupply?
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