SB Standard Lockable Patio Pet Door Insert

Description SB Standard Lockable Patio Pet Doors | Best Utility Model Single Pane Glass | Single Flexible flap | Sliding Glass Pet Doors | Fully Lockable Our Most Popular Utility Insert for Dogs and Cats The SB Standard Patio Pet Door by Security Boss Manufacturing LLC has the functionality as well as the aesthetic appeal that cannot be found in other utility inserts. 4 separate height ranges will ensure this insert can fit any patio door height. Features an adjustable spring-loaded top that can be locked down, preventing possible intruders from compressing the top from the outside and gaining access to your home. All Security Boss products are hand built to order.Specialized design allows for snap on extensions to increase overall patio insert height. Locking tightly in place, each extension adds 2 inches to the insert. Two extensions create a total adjustment range of 7.25 inches. NO TOOLS or DRILLING required for these rock-solid extensions.The SB Standard Utility Pet Door is avai