This patio door handle is used on Fullview doors. The inside handle is a mill finish diecast body with wood handle attached and the outside handle is also mill finish diecast. It has mounting holes 3 in. on center and is surface mounted. Does not require any mortising. The latch hook rotates and engages a flush mounted keeper on the jamb (see Prime-Line parts E 2017 or E 2097). It is a non-keyed unit.