Mr. Goodbar S700 PD 60 is an adjustable security bar designed for sliding patio doors. It can be installed on both inside and outside sliders, and its inside slider installation height is 40 to 52 inches while its outside slider installation height is 40 to 52 inches or 77 to 96 inches. The bar is made of durable steel and features a locking system that helps to prevent forced entry. It is easy to install and comes with all the necessary hardware.