Designed by Unibor.
Made for metal.
SITEH3RO™ is Unibor's ultimate handheld metalworking solution - designed for on-site metalworking with just an impact wrench. Made for metalworkers, #BUILTForMetal
Quick-connect impact-wrench compatible

Square-drive holder that adapts any impact wrench to any SITEH3RO™ bit. Required accessory.
The Power Tool Industry Association 2025 Tool Innovation Award recognises tools that meaningfully change how tradespeople work.
SITEH3RO™ won for letting one operator do work that previously needed a drill press and bench setup, using the impact wrench they already own.
The holder is the adapter between your impact wrench and any SITEH3RO™ bit. One holder per impact wrench. It lives in the chuck and you swap bits as needed. Pick the drive size that matches your impact wrench (1/2" for most cordless impacts, 3/4" for heavy-duty pneumatic).
Fits any 1/2" or 3/4" square-drive impact wrench.
SITEH3RO™ is the direct-to-tradesperson line from Unibor, a Lombard, Illinois metalworking-tool specialist that has supplied bridge builders, structural fabricators, and US shipyards for decades.
Designed by engineers who've spent careers in fab shops, to the standards real tradespeople set.
Questions before you buy, or help after it arrives? Our support team is based in the US and knows these tools from the ground up. Email us or reach out via the site - real answers, not scripts.
SITEH3RO™ is Unibor's ultimate handheld metalworking solution - designed for on-site metalworking with just an impact wrench. Made for metalworkers, #BUILTForMetal
Square-drive holder that adapts your impact wrench to any SITEH3RO™ bit. Hardened steel, lifetime build. Required for using SITEH3RO™ taps, reamers, and step drills. Pick the drive size that matches your impact wrench.
Free US shipping on all orders. Ships from Lombard, IL within 24 hours.
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