These sash locks are constructed of stamped steel and come in an antique brass-plated finish. They feature a draw tight cam action latching design and are designed for use on wooden double hung windows. Locks mount onto the checkrails (meeting rails) of the top and bottom sash and they install with two fasteners each (the lock and keeper). Cam-action sash locks are used by a variety of consumers to replace missing or damaged locks and each are easy to install.