ASSA ABBLOY - EXIDOR 9870 - R Hold Open / Swing free E - Hydraulic overhead door closer, power size 4, features both hold open and swing free options combined within the same unit.Hold open function holds the door open in its open position where as swing free mode allows the door to be opened with no resistance from the closer. However when the buildings fire alarm is activated, power is cut to the unit and the closer then shuts the door. The 9000 series is supplied with an elegant radius cover and has a matching adjustable arm as standard.There are 47No available.