Make of Metal component,which is Enduring,strong and smooth,and have the characteristics of antirust,antioxidation,nondeformation,and nonfading. Suitable for vertical window,sliding window and patios door,you can put it directly on window or door track of sliding window and patios door without any tool,if it is a vertical window,you need to fixing it with tape on the vertical window track. Attention: Please measured your window or door track before purchasing! Window stoppers for sliding window is 1in wide so that make sure your window or door track must be at least 1in wide. Security Rod for window can bear repeated impacts on forced entry,effectively stopping burglars from entering home through sliding window or patios door. The sliding window can also from falling from the open window,ensuring of /family.