Grade 1 certified, ANSI/BHMA A156.4 UL Listed R7483 Cast Iron Body with Hardened Steel rack & pinion Non-handed / reversible Multi-size springs: 1-6 adjustable power ADA compliant Three independent regulating valves - control sweep, latch closing speeds, and backcheck Tri packed- regular pull side, top jamb, parallel arm Supplied with both wood and machine screws