Andersen Hinged Patio Door Lock cylinder with two keys for an Andersen Frenchwood Hinged Door.

Oil Rubbed Bronze
Schlage SC-4, 6 pin keyway is the only keyway available. 
Keys: 2 keys with Andersen Logo 

Measurements:
Length: 1-3/8 inch
Height: 1 inch
Diameter: 5/8 inch 

Related Andersen Parts:
2579499 - Keyed Cylinder with Brass Lock Housing
2579542 - Lock Actuator
2579637 - Keyed Cylinder, Brass
2579641 - Keyed Cylinder, Chrome

Andersen's Manufacturer's Guide to Exterior Keyed Cylinders: PDF