16" to 51" Adjustable: Sliding door security bar consisted of telescoping and splicing extension rod allows for maximum adaptability to fit most average and huge window or sliding doors, provides an additional layer of protection, preventing forced entry and keeping your home safe and secure 2 in 1 Security Bar: The bottom of the lock bar can be easily removed, you can use this window safety bar as sliding door security bar for sliding glass door and windows, also as window security bars for large patio doors or sliding doors 2Pack Child Proof Safety Bar: Sliding door security bar can provide a visual and physical deterrent to intruders and reduce the risk of burglary. They can also prevent children and pets from falling out of windows. Ideal for homes with children or pets, this bar prevents doors from being accidentally opened, adding safety and peace of mind Heavy Duty Lock Bar: Constructed of high grade metal, this sliding glass door lock bar is able to withstand 400 pounds of pressure, providing reliable protection for your home,apartement or office. Extra little key adds a lot more security to the bar Easy Installation and Portable: There is virtually no installation, just set it in the track. This sliding door security bar is easy to assemble and take apart for storage and fit in your large luggage, can be used not only at home but also in hotel rooms or vacation rentals, ensuring safety wherever you go