// About SITEH3RO™
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
STEP REAMER KIT · 3 PIECE
Cover Every Major Bolt Size
SKU · SHUSR1
Step Reamer Set
Expand 15 sizes with three tools.
Three step reamers covering 15 sizes from 5/16" to 1-1/16". By Unibor. Built For Metal.™
3
Step
reamers
reamers
15
Sizes
covered
covered
75%
Longer
tool life
tool life
What's in the kit
3 step reamers, 15 sizes covered
5/16"-9/16"
STEP REAMER
9/16"-13/16"
STEP REAMER
13/16"-1-1/16"
STEP REAMER
$389.92
A holder is required
A holder is required, and one works with every SITEH3RO™ tool. 1/2" fits most cordless impacts, 3/4" heavy-duty pneumatic.
Already own one? Just add the tool below.
PTIA 2025 Tool Innovation Award
Judged by the Power Tool Industry Association, which recognizes tools that meaningfully change how tradespeople work.
- Free US shipping, 3 to 7 business days
- Ships from Chicago
- Secure checkout by Stripe
PTIA 2025 Tool Innovation Award
The Professional Tool & Industrial Alliance recognized the SITEH3RO™ system with its 2025 Tool Innovation Award.
The award recognizes tools that materially change how a job gets done on site. The SITEH3RO™ system was selected for letting tradespeople do bench-quality drilling, reaming and threading using only the impact wrench they already carry.
Free US Shipping
Free shipping on all orders to the continental United States. Orders are processed in 1 to 2 business days from our Chicago warehouse, and delivery takes 3 to 7 business days.
Designed by Unibor.
Three step reamers covering 15 sizes from 5/16" through 1-1/16". Dual flute design for smooth, chatter-free reaming. SITEH3RO™ coating on every reamer for up to 75% longer tool life. PTIA 2025 Tool Innovation Award winner.
| Pieces | 3 step reamers |
|---|---|
| Coverage | 15 sizes, 5/16" through 1-1/16" |
| Material | High-speed steel |
| Flute | Dual flute |
| Coating | SITEH3RO™ coating, up to 75% longer tool life |
| Shank | 7/16" hex |
| Compatibility | SITEH3RO™ holders + standard 3-jaw drill chucks |
Free shipping on all orders within the continental United States. Orders are processed in 1 to 2 business days from our Chicago warehouse, and delivery takes 3 to 7 business days.
