Long Service Life: With electrostatic spraying on steel surface, the window security bar can effectively avoid rusting, smooth and burr-free to touch and safe to use. In addition, the anti-slip rubber at both ends enhances the friction, making it easier to fix and won't damage the window frame.Proper Size: The security bars for windows is about 40-70 cm/15.8-27.6 inches.When the bar is unscrewed, the built-in spring provides enough tension to act as a hold.Notice:Please measure the size of your window before purchasing to confirm if our window lock bars will fit the size of your window.Adjustable Design: The window lock bar can be easily adjusted to the ideal width to effectively prevent intruders from entering and also protect children from being hurt when opening the door due to curiosity.Ideal Accessory: You will receive 2 pack of window lock bars with adjustable height, lockable to improve window security, and sufficient quantity to fully meet your daily needs.Wide Range of Uses: The window safety bars can be applied as a sliding door lock to ensure home security, or as a telescopic bar to hang curtains, drapes, etc.