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Irwin Unibit 3/16 to 7/8 in. X 6 in. L High Speed Steel Step Drill Bit Square Shank
Irwin Unibit 3/16 to 7/8 in. X 6 in. L High Speed Steel Step Drill Bit Square Shank
Irwin Unibit 3/16 to 7/8 in. X 6 in. L High Speed Steel Step Drill Bit Square Shank

Irwin Unibit 3/16 to 7/8 in. X 6 in. L High Speed Steel Step Drill Bit Square Shank

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Drills nine hole sizes from 3/16" to 7/8" with a single high speed steel bit - no bit changes needed.
Irwin MPN 10234 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $44.99. Our online price is $49.99.
$49.99
Includes free shipping on orders over $75 · $8.99 standard below
Delivery in as little as 1–4 business days Order within — for same-day shipping
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Every order helps keep your local hardware store on the corner.

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You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
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About Product Overview

One bit, nine hole sizes. The IRWIN Unibit #4 is a step drill bit that lets you go from 3/16" up to 7/8" without ever changing tools - just drill deeper into the stepped profile until you hit the diameter you need. That makes it a go-to for sheet metal, electrical boxes, and any job where you're punching multiple hole sizes into thin stock.

Built from high speed steel for durability under repeated drilling, with a 3/8" square shank that seats securely in the chuck and resists spinning under torque. At 6" overall length, it gives you reach into boxes and panels without the bit itself getting in the way. Comes carded, one bit per package, ready to grab and use.

  • Material: High Speed Steel
  • Drill size range: 3/16" to 7/8"
  • Shank diameter: 3/8", square shank
  • Overall length: 6 inches
  • Product type: Step drill bit
  • Sub brand: Unibit

The Details Specifications

Brand Irwin
UPC 038548101040
Case Pack Quantity 5 per case
Retail Unit Quantity 1
Dimensions (L × W × H) 1 × 3 × 6
Weight 0 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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