ECONOMIC HEAVY-DUTY DOOR CLOSER;HEIGHT: 17-5/8in OVERALL, 448 MM OVERALL;INCLUDES: SPRING CARTRIDGE, ROLLER GUIDE, ROD;PLATING: ZINC-PLATED BRIGHT;TYPE: ADJUSTABLE SPRING TENSION;FOR USE ON LEFT- OR RIGHT-HAND DOORS;USER-FRIENDLY SPRING-LOADED WINDING PAWL;AUTOMATICALLY DISENGAGES;WIDE ROD GUIDE ALLOWS ROD TO FLOAT FREELY AS DOOR;MOVES UP AND DOWN;STEEL RETAINING PIN AND FULLY CAPTURED FLANGE;PREVENT ARM FROM LIFTING OFF DOOR;SPRING-LOADED PIN AUTOMATICALLY ENGAGES GEAR AND;SHAFT