Durable Construction: The sliding door security bar made from high-strength steel, providing robust protection against forced entry. The sliding door stopper can be utilized as a patio door security bar or a window security bar. Enhanced Security: 1-inch diameter sliding door lock bar can withstand 300 lbs of force, protecting your pets and children. While using it, please be careful to place the bar horizontally in the lower track of sliding or window door. Adjustable Length: The sliding door lock comes with an extra extension bar for smooth adjustment between 20.5-50 inches to fit various lengths. Equipped with enhanced high-strength alloy connections to extend the service life of the window bars security inside home. Quick Setup: Effortlessly adjust the length by rotating the bar and place it in the track for hassle-free installation. The sliding patio door lock is designed with an extended rubber tip for a stronger grip, preventing harm to windows or doors. Customer Service: This lock for sliding glass door includes a 12-month customer service guarantee for troubleshooting or any product-related inquiries. If there are any issues with the product, contact us via Amazon, and we will handle hassle-free returns for you.