friction hold open arms allow the door to be automatically placed in the hold open position until the user puts force on the door to disengage the friction hold and cause the door to close. a friction hold open arm can be used with the standard template of the door closer; it's a simple replacement.
How do you adjust an LCN door closer?
https://www.youtube.com/watch?v=CdMq5kzwoAk
Are LCN 4111 closers handed?
This LCN 4111 adjustable door closer is supplied with the EXTRA DUTY parallel arm of your choice. This closer is suitable for potentially abusive applications because of its high durability standards. Select right or left handed to fit your door properly.