This Pella casement sash lock Mechanism used with single or double hook latches.

Application: Designer & Architectural Series Window
Handed: Yes, As Shown 
Material: Mixed, Plastic and Metal 
Markings:  None on Mechanism, but 77Z2 is on the hook latch

Note: These are normally sold as a kit depending on window height.
The kit comes with  Rod, Lock Mechanism, screws and 1 or 2 sash locks depending on window height.

These are parts from kits and are limited to existing inventory