Tahikem 4 Sets Sliding Window Locks, Security Window Double Lock with Key, Aluminum Stoppers, for Width Less Than 19/32" Height Greater Than 3/4" Track Vertical & Horizontal Slide Door Child Windows -
2 Pack Sliding Window Security Locks with Keys, Aluminum Alloy Window Wedge Safety Lock, Windows Guard Stopper, Anti Theft Children Door Frame Stop Bars for Home and Office Child Safety - Amazon.com