2579527 is discontinued and replaced with 2573472

Andersen PASSIVE Lock Mechanism for inactive door.
Lock box with locking bolts at top and bottom
For french wood hinged patio doors 1988-1998
This unit fits The 6-8 or 80 inch tall door.
Overall length: 76-1/2 inches
Faceplate Width: 7/8 inch
Backset: 2 inch

Related Andersen Multi-point locks - FWH68 door
2579771 - 6-8 Active New Style
2579777 - 6-8 Passive New Style
2579512 - 6-8 Active Old Style
2579527 - 6-8 Passive Old Style

Resources:
Article: How to Change Handing of Andersen Multipoint Locks
Manufacturer's Guide: How to Replace an a Multipoint Lock in an Andersen Door

Rehanding an Andersen Multipoint Lock