Sheet metal folders and crimpers bend and shape sheet metal for HVAC ductwork, roofing, and metal fabrication applications. Hand seamers operate like wide, flat-jaw pliers to fold cut edges, join panels together, remove ripples and wrinkles, and grip sheets to move and position them. Sheet metal crimpers create indentations that allow for joining ducts, downspouts, and metal stud framing. Sheet metal folding tools make long, uniform bends, holding the sheet edges to a set depth to guide the fold.