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The WILLIAMS COMFORT PRODUCTS 1-143-12-1-0 is a 12-inch bastard cut mill file rated at 37 teeth per inch (TPI). Mill files in this cut and size are standard tools for deburring, sharpening, and draw-filing flat or slightly curved metal surfaces. The bastard cut sits between coarse and second-cut grades, removing material quickly while still leaving a reasonably smooth finish. At 0.679 pounds, the file is lightweight enough for extended single-hand use. Tradespeople across HVAC, plumbing, and general mechanical service rely on this type of file for dressing valve seats, cleaning burrs off pipe threads, and maintaining cutting edges on hand tools.
This mill file suits residential and light commercial service work where a general-purpose flat file is part of the standard tool kit. It is appropriate for use on mild steel, cast iron, aluminum, brass, and similar soft to medium-hardness metals. Typical applications include deburring cut conduit ends, smoothing rough pipe cuts, and touching up blade edges. The 12-inch length provides good leverage for bench work as well as in-field use on installed equipment.
Designed as a general-purpose mill file suitable for use on mild steel, cast iron, aluminum, brass, and similar metals in HVAC, plumbing, and electrical trade applications.
Mill files are hand tools and require no power source or code-specific installation procedure. Always secure the workpiece in a vise or fixture before filing to prevent movement and injury. Use a proper file handle to protect against tang injury during use. Keep the file clean with a file card to maintain cutting efficiency and extend tool life.
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