Window Sash Lock secures each window in your home One of the easiest ways for an intruder to get into any home is through unlocked double-hung windows. Window locks are an indispensable part of your home security plan, and this window sash lock does the job beautifully on each double-hung window; locks it positively closed. Polished brass finish on this window sash lock matches any decor. Includes mounting screws.