The PSEN b1 is without escape release and without locking pin. The PSEN b2 is with escape release and has a locking pin (which can be deactivated) to protect the bolt from closing unintentionally. ...
The PSEN b1 is without escape release and without locking pin. The PSEN b2 is with escape release and has a locking pin (which can be deactivated) to protect the bolt from closing unintentionally. ...