Unibor SiteHero Step Reamer, 5-step M2 HSS reamer with 7/16 inch hex impact shank

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Unibor SiteHero Step Reamer

★★★★★

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Authorized Dealer: Unibor

Official Partner

IN STOCK & READY TO SHIP

SKU: SR312562

Size/Kit: SiteHero Step Reamer 5/16" & 3/8" & 7/16" & 1/2" & 9/16"

Variant

Price:

$91.08

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 with the exclusive SITEH3RO™ coating
5 Steps per Tool: Each reamer covers 5 diameters at 1/2" step lengths, spanning all major bolt sizes in its range
Impact Wrench Ready: 7/16" hex impact shank fits the SITEH3RO™ holder for cordless on-site work
M2 HSS Construction: Manufactured from tough M2 high-speed steel for durability in mild steel, aluminum, brass, and plastic
Also Chuck Compatible: Works in standard 3-jaw drill chucks as well as impact wrenches

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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

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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 Reamer (size/kit selected via variant)
Type	Step Reamer
Diameter Range	Varies by size selected — individual reamers span 5 diameters each, or the 3-piece kit covers all three ranges
Shank Type	7/16" hex impact shank (also runs in a standard 3-jaw chuck)
Material	M2 High Speed Steel (HSS)
Steps	5 diameters per tool
Step Length	1/2" per step

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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Frequently Asked Questions

A step drill creates new holes of multiple diameters in one pass, while a step reamer enlarges and finishes an already-drilled hole in defined increments for a more precise, burr-free fit.

A drill cuts and removes material to form a brand-new hole, while a reamer lightly scrapes and finishes an existing hole to bring it to an exact, smooth diameter.

Yes, smaller reamers can be turned with a hand drill at low speed, though impact-rated step reamers like SiteHero models are built to run with an impact wrench for faster on-site work.

Reaming only fine-tunes an existing hole rather than creating one, removes material more slowly than drilling, and can wear or chip if run too fast or without enough lubrication.

Precision step tools cost more because they're machined from wear-resistant high-speed steel or cobalt, ground to tight tolerances, and often coated to extend cutting life and reduce heat.