Homematic IP Adapter for Round Rosette Door Lock Actuator - pro, anthracite #163089A1 Easily Mount the Door Lock Actuator to Round Rosettes The adapter enables easy and precise installation of the Homematic IP Door Lock Actuator - pro on doors with standard rosettes and a screw spacing of 38 mm. To do this, attach the adapter to the inside of the door using the existing rosette screws. Then, simply mount the mounting plate of the door lock actuator - pro to the adapter using the included screws.