Abloy CY066 Finish Round Cylinder and TurnAbloy CY066 Finish Round Cylinder and Turn. For use with mortice locks on aluminium and other narrow profile doors. Product description Cylinder with thumb turn to be used with mortice lock cases for narrow stile doors, both mechanical and electric lock cases. Lock is operated by key from outside and by thumb turn inside the door. Overview of Advantages: Can be use with wide range of Finnish type mortice lock cases for narrow stile doors Strong