Generally, a cam-action type lock applied to the check rails of a sliding window or at the open edges of a projecting window to pull the check rails tightly together or to seal the sash tightly to the frame, both for security and weather-tightness.
Millwork Definitions
Sash Lock
We fabricate any type of architecturally specified wood. To help you get your bearings – there are a thousand definitions in our guide here. Contact us to have the custom pieces made to order in any species you request.