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Irwin Unibit 1/4 to 3/4 in. X 6 in. L High Speed Steel Step Drill Bit Square Shank

Irwin Unibit 1/4 to 3/4 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.

One bit steps from 1/4 to 3/4 inch, so you skip the constant bit-swapping when sizing up holes in metal or plastic.
Irwin MPN 10233 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $39.99. Our online price is $44.99.
$44.99
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.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

The IRWIN Unibit #3 is a step drill bit, which means one tool covers a whole range of hole sizes instead of you swapping bits every time you need to go bigger. It steps from 1/4 inch up to 3/4 inch, so you can drill, then enlarge, then finish a hole all in one pass without stopping to change tooling. That makes it a favorite for electricians and HVAC techs working through electrical boxes, conduit, and thin metal enclosures, as well as anyone drilling sheet metal or plastic where a standard twist bit tends to grab or walk.

Built from high speed steel for durability under repeated use, it has a 3/8-inch square shank that seats securely in a standard drill chuck. At 6 inches overall, it gives you enough reach for most panel and enclosure work, and it ships carded as a single bit made in the USA.

  • Step drill bit, high speed steel construction
  • Drills sizes from 1/4 inch to 3/4 inch with one bit
  • 3/8-inch square shank
  • Overall length: 6 inches
  • Packaged individually, carded
  • Made in USA

The Details Specifications

Brand Irwin
UPC 038548101033
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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$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
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The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

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About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a co-op banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

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