Unibor SiteHero Step Drill, 7/16 inch hex impact-wrench-ready step drill

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Unibor SiteHero Step Drill

★★★★★

Iron Line Verified

Authorized Dealer: Unibor

Official Partner

IN STOCK & READY TO SHIP

SKU: SD125500

Size/Kit: SiteHero 1/8" to 1/2" Step Drill

Variant

Price:

$66.00

Quantity:

Financing as low as ~$1 / month (60 mo. terms) Estimate your payment

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Extended Tool Life: Up to 75% longer tool life thanks to the exclusive SITEH3RO™ coating
Impact Wrench Ready: 7/16" hex shank fits the SITEH3RO™ holder, so it runs directly off a compatible impact wrench for on-site, cordless work
Multi-Diameter, One Tool: Steps through a full range of hole sizes and enlarges existing holes without swapping bits
Also Chuck Compatible: Works in standard 3-jaw drill chucks as well as impact wrenches
Job-Site Applications: Suited to HVAC, automotive, and other thin-gauge sheet metal work

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*Please Note: This timeline is an estimate. Certain products may require an additional 1 week for manufacturing. Please speak with your sales rep, Matthew, for official details and confirmation before placing your order.

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Experience: 20+ Years B2B • Origin: US-Based Support

EXPRESS SHIPPING

Most orders process in 1-3 days. Yes, even if it weights 400lb

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Dedicated Rep Mathew

Speak to a US-Based Equipment Specialist: (888) 308-5580

Flexible Financing

Get Upto 60 Months Financing

Brand	Unibor — SITEH3RO™ (Unibor's impact-driver-compatible job-site sub-brand)
Model/SKU	SiteHero Step Drill (size/kit selected via variant)
Type	Step Drill
Diameter Range	Varies by size selected — individual step drills, or the 3-piece kit covering the full range
Shank Type	7/16" hex impact shank (also runs in a standard 3-jaw chuck)
Material	M2 HSS (consistent with the related SiteHero step reamer line)
Coating	SITEH3RO™ exclusive coating, up to 75% longer tool life
Number of Steps	Varies by size selected

Key Information

Order Cutoff Time: 2:00 PM EST
Order Handling Time: 1–3 business days (Monday–Friday)
Transit Time: 1–7 business days (Monday–Friday)
Total Estimated Delivery Time: 3–11 business days (Monday–Friday)
Shipping Availability: Free Shipping On some Items In The Contiguous United States only

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Job Site Proven

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Frequently Asked Questions

Standard step drill bits commonly top out around 1-3/8" in diameter for heavy-duty models, with multi-step designs covering a wide range up to that size in a single bit.

Step drill bits are also commonly called "unibits" or "cone drills" because of their single tapered, multi-diameter cutting body.

Each visible step corresponds to a specific hole diameter, so as the bit is driven deeper the hole widens in stages until it reaches the size marked at that step.

Depending on the model, a single step drill bit can typically cut anywhere from 6 to 13 different hole diameters.

Yes, step drill bits made with an impact-rated hex shank and a hardened coating, like SiteHero-style bits, are designed to be driven safely and efficiently with an impact driver or impact wrench.