Sash lock for double hung windows. 
The keeper is located inside the housing and the cam action provides good seal when locked.

Hole Spacing: 2-1/16 inches
Screw Backset: 7/16 inch
Material: Die-cast

Available Colors:
Bronze (discontinued / unavailable)
Silver

Contents:
1 lock, 1 keeper, and Installation screws

Priced and sold each.