Rhin-O-Tuff High-quality ONYX punch and binding machines, made in the USA and backed by an unprecedented 3-year warranty, provide a solution for all of your onsite business and personal binding needs



Wire Inserter & Closer


Having trouble wire binding larger documents like calendars? Rhin-O-Tuff 18″ semi-automatic wire inserter and closer will go beyond and above to provide the professional finish you desire.

The HC8318 has eliminated the manual insertion of wire into document with one easy inserts and closes step. Perfect for 3-1 double loop binding wire with a wide range of 1/4 to 9/16 inches. The lightweight, portable and convenient machine is constructed from a high-quality metal with a long life span. Built-in extension table will help better assist with larger and wider documents. 

ONYX HC8318 Images

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Product Details
Dimensions: (H / W / D) 16″ x 19″ x 14″ 
Weight 44 lbs
Max Capacity 18″
Max Binding Edge18″
Warranty3 years
Part NumberHC8318 ONYX
Shipping Weight

56 lbs


  • *Closes 3-1 Double-Loop Binding Wire* 3-1 Pitch 1/4. to 9/16 inch (6 to 14 mm)
  • 18″ Binding Edge
  • Eliminates manual insertion of wire into documents with 1 easy step
  • Easily Adjustable for Wire Sizes
  • Lightweight and Portable
  • Easy Operation at any Wire Size
  • All Metal Construction
  • Made in the USA with more than 98% recyclable materials

I am very satisfied with Masterbind's products! The Atlas 300 book binding machine along with Masterbind's digital printing service has helped my company create professional portfolios for our clients. Masterbind's Atlas binding machine is easy to use and has help my employees productivity by saving time and has helped my business save money and increase sales by up to 40%.

Albert WilliamsReal Estate Manager

Masterbind USA's  knowledge and experience with book binding was very helpful for me and my company. We use their hardcover books in linen for our company reports and client portfolios. Masterbind was able to create a customizable cover for us that was professional and unique to our brand. I highly recommend using their services!

GG MitrescuProduct Manager

I recently purchased the Masterbind trimmer stand alone unit for my printing company. We attached it to our roll laminator from Royal Sovereign and use it for our medium to larger runs. The adjustable slitting blades and time sensors are well worth the purchase.

Daniel HumphriesOwner | CEO

Product Manual

Product Data Sheet

Operations Video

Warranty Information

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Masterbind selling Rhin-O-Tuff Paper punch machines for home offices, businesses, and schools. Automatic, fast, and affordable machines delivered right to your door.



The Rhin-O-Tuff Onyx HD8370 Insert-A-Bind Wire Inserter & Closer closes 3:1 pitch double loop Wire-O® in one easy step, eliminating manual insertion of wire into documents.

ONYX HD8370 Features

  • Double-loop binding wire
  • 14″ Binding Edge
  • Easily Adjustable for Wire Sizes
  • Lightweight & Portable


Rhin-O-Tuff Onyx HC8024 24" Manual Flat Bar Wire Closer

ONYX HC8024 Features

  • 24” (610mm) Binding Edge
  • Easily Adjustable for Wire Sizes
  • Lightweight and Portable
  • Slide Out Table Extension 
  • Easy Operation at any Wire Size
  • All Metal Construction
  • 3 Year Warranty


Rhin-O-Tuff Onyx HD8000 14" Manual Flat Bar Wire Closer

ONYX HD8000 Features

  • Reversible binding handle
  • Exclusive reversible top closing bar
  • Optional raised front feet
  • Wire compatibility from 3/16 inch to 1 1⁄4 inch
  • Stand-alone operation or mounts on most Rhin-O-Tuff Punches
  • Durable all-metal construction
  • 3 Year Warranty

ONYX HC8318- Images

Rhin-O-Tuff Onyx HC8318 18" Semi-Automatic Wire Inserter and Closer

ONYX HC8318 Features

  • Semi-Automatic wire inserter
  • Perfect for 3-1 double loop binding wire
  • Lightweight, Portable & Convenient 
  • Built-in extension table