The Universal Hydraulic Quick Coupler B-Lock has been designed and developed in order to comply fully the European regulation EN474. For this reason, the operator can work with the quick coupler safely avoiding the fall down and/or the oscillation of the equipment hooked in case of malfunction in the main pins locking system. This new security system has no any influence in terms of time during the operations of equipment change. The uniqueness of the coupler is that: - front and rear pins are mechanically and independently locked; - both locks are visible from machine cab; - the release of the locks is fully automatic. Optional: certified lifting hook