YX25.4-520 Snap-Lok Standing Seam Roll Forming Machine A dedicated snap-lok standing seam roll forming machine built for concealed fix metal roofing production. The line runs 0.5–0.8 mm pre-painted steel, galvanized steel and aluminium-zinc coil at 625 mm input width and delivers a snap-lok standing seam panel with a 25.4 mm seam height and 520 mm effective cover width. Hydraulic pre-punching and pre-notching let you punch fastener holes and notches in-line, so panels reach