Simple rim deadlock from IFAM with steel body, strike plate and springs and also an epoxy paint finish, all of which makes this lock suitable for outside applications.  The X5 rim lock from IFAM is operated by a euro cylinder, NOT SUPPLIED, any size of style of euro cylinder can be used depending on size and location of door - double cylinder from key operation on both sides, thumbturn cylinder for key outside and turn inside or half cylinder for key operation on just one side.