2579512 Andersen ACTIVE 3- Point Lock Mechanism.
Anderson FRENCHWOOD HINGED PATIO DOOR Old Style multipoint lock
Deadbolt at handle and LOCKING HOOKS at top and bottom.
On the old style lock - both hooks lock in the up direction.
on the new style, Bottom one locks up, Top one down.
This unit fits The 6-8 or 80 inch tall door.
Overall length: 76-7/16 inches.
Faceplate Width: 7/8 inch.
Backset: 2 inch
Note: Andersen had 3 heights 80, 83, 96 inch tall doors.
Most locks have the 7 digit part number on the face plate
Old style Lock Number 2579512 has been replaced with New Improved Lock # 2579771
REPLACE WITH 2579771.

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 

How to Change the Handing (right to left or left to right) of your Andersen® Lock: Click on the link to find a manufacturer's guide on Andersen's website. (Scroll to Service Guides > "Hardware – Lock Mechanism Handing Change [0005204]").

How to Replace an Andersen® Multipoint Lock in a Frenchwood® or A-Series Outswing or Inswing Door:Click on the link to find a manufacturer's guide on Andersen's website. (Scroll to Service Guides > "Hardware - Lock Mechanism Replacement [0005233]").