The LC-12DR is a versatile and widely-used Pittsburgh lock former, the core equipment for standard square and rectangular HVAC duct fabrication. It supports processing galvanized sheets with a thickness range of 0.5mm to 1.2mm, equipped with a 1.5KW high-efficiency motor and 6 sets of standard forming rollers, enabling one-time forming of multiple lock profiles including Pittsburgh lock, right angle seam, S cleat, and drive cleat. With a compact body, movable casters, and a total weight of 210KG, it is easy to transport and ideal for on-site construction and small-to-medium duct processing workshops, ensuring stable forming accuracy and long service life with high-quality hardened steel gears and shafts.