Yes, hybrid cylinders can be easily retrofitted and installed. Replace your existing locks with a modern version that combines mechanical and electronic access systems. Lock your doors on one side with a key and unlock them on the other side, for example with a smartphone, access card or combi key with a chip integrated into the key bow. Hybrid cylinders, such as EVVA AirKey cylinders, enable you to manage access authorisations and control master key systems via online administration.