Step Drills

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Step Drills

SKU: SD125500

World-Exclusive Coating
Impact Wrench Powered
PTIA 2025 Winner

Drill multiple hole sizes with a single progressive tool, powered by your impact wrench. Ideal for electricians, HVAC fitters, and sheet metal work.

Select Size

$106.25

In StockShips fast from Unibor HQ in Chicago
Award WinnerPTIA 2025 Tool Innovation
Real SupportUS-based team — call or email anytime

Works with SITEH3RO™ HoldersGot one already? You're set. First time? Pair with a 1/2" or 3/4" holder to match your impact wrench.

1/2" Holder 3/4" Holder

The SITEH3RO™ Difference

Engineered for Professionals. Exclusive by Design.

Designed by Unibor for tradespeople who value tools that last and outperform. Every SITEH3RO™ cutting tool is engineered around three things you won't find together anywhere else.

World-Exclusive

A Coating No Competitor Has

Our proprietary high-performance coating is exclusive to SITEH3RO™ — not licensed, not available from any other manufacturer, on any other cutting tool. Independently high-temperature tested to 356°F. Delivers up to 75% longer tool life compared to standard coated alternatives, so your bit keeps biting long after a hardware-store bit would've dulled.

Patent Pending

Runs on the Tool Already in Your Hand

The SITEH3RO™ shank system is the only metalworking cutting-tool interface engineered to harness the full power of a modern impact wrench. Connect from any angle, lock in seconds, and turn a $200 impact driver into a full-range metalworking machine. No chucks, no adaptors, no slippage. Patent pending (WO2024/100390).

PTIA 2025 Winner

Designed by Unibor. Made for Metal.

Designed by Unibor — a metalworking tool specialist based in Lombard, Illinois, and winner of the PTIA 2025 Tool Innovation Award. Every SITEH3RO™ product is engineered by people who've worked metal for decades, to the standards real tradespeople set.

The SITEH3RO™ step drill gives you multiple hole sizes from one tool — drill up to 1-3/8" in steel plate, sheet metal, and thin gauge material without swapping bits. Spiral flute and split point design start cleanly without a pilot hole and clear chips efficiently. Powered by your impact wrench via a SITEH3RO™ holder — ideal for electricians, HVAC fitters, and sheet metal workers who need fast, accurate holes on site.