When used for heating, ventilation, and air conditioning (HVAC) systems, sheet metal requires specialty machines to form all the connections necessary for duct work. Various rotary machines are available for crimping, beading, and flanging. You'll also find HVAC machines for forming drive cleats, S cleats, the popular Pittsburgh seam, and much more.
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I'm very pleased with my purchases. American quality should rank first in our consideration when it comes to making a purchase. Not low price for an inferior product. This company carries a fine selection of American built tools.