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The MARS 25639 is a 12-inch straight tinner used in HVAC sheet metal and duct fabrication work. Tinners are hand tools used by HVAC technicians and sheet metal workers to cut, shape, and work with sheet metal during duct installation and repair. The 25639 features a straight profile at 12 inches in length, making it a standard size for general sheet metal applications. This tool is a staple in the kit of anyone working with ductwork, flashing, or light-gauge metal on residential and commercial HVAC projects.
The MARS 25639 straight tinner is suited for use in residential and commercial HVAC installation and service environments. Sheet metal workers and HVAC installers reach for this tool when fabricating or fitting duct sections, trimming metal edges, or working on flashing and collars. Its straight configuration makes it appropriate for flat and open sheet metal tasks where a straight cutting or working edge is needed.
Designed as a general-purpose straight tinner for use in standard HVAC sheet metal and duct fabrication applications.
This tool is used by licensed HVAC technicians and sheet metal workers in duct fabrication and installation. Always wear appropriate cut-resistant gloves when working with sheet metal edges. Ensure the work area is clear and metal pieces are secured before cutting or shaping. Follow applicable SMACNA guidelines and local codes for duct construction and installation practices.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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