The American Eagle 3100 Series is a rack and pinion closer featuring a cast aluminum body, round style arm assembly and optional streamline cover. Hydraulic control is achieved through separate non-critical sweep, latch and backcheck valve adjustments. Closers are non-handed and suitable for regular, top jamb and parallel arm applications and come with fasteners for wood and metal doors and frames. Sex nuts and bolts are also furnished standard. Closers are available in adjustable versions for sizes 1-4 or 3-6. The 3100 is listed by U.L./U.L.C., complies with UL 10C and UBC 7-2 (1997) for positive pressure and is certified to ANSI A156.4 Grade 1.