South Korea-based Jinwoong Technology Inc. has an exclusive arrangement with Standard Sheet Metal Inc. of Cedar Rapids, Iowa, to sell and service Jinwoong spiral and rectangular duct-making machines in North America, South America, Central America and the Caribbean.

Jinwoong builds four full duct machines, two of which offer in-line seam closing. Three starter duct machines and a full line of TDC and TDF machines, along with rectangular duct support equipment, are available.

It also has two spiral tube-forming models, gore seaming and closing machines, and stitch and continuous seam welders.

Jinwoong claims it is the inventor of PDF-3 patented duct-flange connection and Diamond embosser/duct machines.