The Yale PM560 British Standard 5 lever mortice sashlock is ideal for external use with wooden doors, suitable for both left and right-hand opening doors. For ensured security, the lock is up to the British Standard BS 3621:2007 and it is Secured by Design approved, making it recommended by insurance companies and the police for maximum protection of your home. Available in a Brass finish, the mortice lock has a 3 Inch/76mm backset and is supplied with two standard Yale keys. Additional replacement keys can be ordered from a locksmith.