Deltana WL07 Window Sash Lock, 1" x 2-5/8"

The WL07 sash lock body measures 1 x 2-5/8 inches, with mounting holes on 2 inch centers. That footprint needs a meeting rail with at least an inch of flat face to sit on. Measure the rail before ordering; if your rail is narrower than an inch, the lock will overhang.

Center to center is 2 inches on the WL07. That matters on a replacement: if the old lock left holes at 2 inch spacing, this one lands on them and you skip filling and re-drilling the sash. Anything else and you are drilling fresh pilot holes.

Solid brass throughout, not a zinc casting with a brass look. For a property manager that is the difference between a lock that survives a decade of tenant turnover and one that snaps at the cam. It also means the ones on coastal or high-humidity buildings hold up better than diecast.

Ten: PVD Polished Brass, Polished Brass, Antique Brass, Polished Nickel, Brushed Nickel, Antique Nickel, Polished Chrome, Brushed Chrome, Oil Rubbed Bronze, and Paint Black. If you are matching existing hardware across a building, PVD Polished Brass is the one to pick over standard Polished Brass where hands touch it constantly, since the PVD coating resists wear rather than relying on lacquer.

Rated for commercial use, so it is appropriate for multi-family, office, and institutional windows, not just houses. Solid brass construction is what carries it there. Buy one finish across the whole property and every double hung window matches.

A sash lock is the cam style latch that mounts on the meeting rail where the upper and lower sash overlap, pulling the two sashes tight together as it turns. That is the double hung and single hung application. For a casement or awning window there is no meeting rail, so this is the wrong part; those take a locking handle or a sash fastener at the stile. Sliders take a different latch again.