The PDQ 53/5500 Series surface mounted closer is a narrow projection full rack and pinion closer featuring a heavy duty cast aluminum closer body, stamped flat style arm assembly and either a slim line cover on the 5300 or a full cover on the 5500 series.. Hydraulic control is achieved through separate hex-key non-critical sweep, latch and back check adjustments. An optional delayed action is available that is effective from maximum opening to approximately 70 degrees. Closers are non-handed, suitable for regular, top jamb and parallel arm applications and come with fasteners for wood or metal doors and frames. Sex nuts and bolts are also furnished standard. Spring adjustment is provided throughout a range of sizes 1-6 making the 53/5500 capable of meeting barrier free opening force requirements. All products carry a 25-year manufacturer’s limited warranty. The 5500 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.