Dexter DCH1000 Series Heavy Duty Surface Door ClosersGrade 1, UL / UL 10C Listed (non-hold open arms), ADA compliant at size 1;Adjustable spring size 1-6;6-3/4″ x 2-3/8″ mounting hole pattern;Staked, independent adjustment values: sweep speed, latch speed, and back-checkSingle piece, cast aluminum body;Universal hardware pack.Regular arm (Rw/PA): Non-handed, regular arm with adjustable forearm assembly to accommodate a range of doors and frame reveal conditions. Mounts hinge side, topjamb or parallel arm. PA shoe included to allow installation in a parallel arm configuration.Hold-open arm (Hw/PA): Non-handed, hold open arm with adjustable forearm assembly to accommodate a range of doors and frame reveal conditions. Mounts hinge side, top jamb or parallel arm. PA shoe included to allow installation in a parallel arm configuration.Dead stop arm (DS): Non-handed, stamped, heavy duty, parallel arm includes a positive mechanical stop and non-adjustable forearm assembly for high volume traffic or potentially abusive installation conditions.Dead stop hold-open arm (DS/HO): Non-handed, stamped, heavy duty, hold-open parallel arm includes a positive mechanical stop and non-adjustable forearm assembly for high volume traffic or potentially abusive installation conditions. Also includes a manually selective hold open function.DOWNLOADSDCH1000 Installation Instructions