Increase security and safety to your horizontal or vertical sliding windows with this security window bar by Ideal Security®. The sturdy mounting bar adds a visual deterrent, making would-be thieves turn back when they see it blocking the window. Adjustable between 10.6-in to 16.625-in (BK112) and between 15.7-in to 26.75-in (BK111) using the easy release lever. Our window bar allows for smooth opening and closing. Lock your window in place, even when it's open. Prop your window slightly open for ventilation or install an in-window air conditioner, all while ensuring the window remains locked in position. This bar is child-proof, ensuring children can't open the windows without supervision. It can also be removed from both saddles quickly, providing a quick and easy escape in case of emergency. If you are renting or you are in a dorm you can use the double-sided tape provided to fasten the two saddles so that they can be removed without leaving a trace.