Hold-open door closer arm for regular, top jamb or parallel arm mounting.
Arm Length: 12''
Forearm Length: Minimum: 10-1/4'' Maximum: 15-1/4''
Thread: 10mm (3/8'') 1.25 thread pitch
Shaft Mounting Hole: 12mm Square
Note: To function properly when regular or top jamb mounting, the door closer, door must be open a minimum of 90 degrees.
This Hold Open Arm will work on any door closer with a 12mm square shaft.