General description Give your cat the freedom to come and go as it pleases with this Size 4 Position Pet Door. This cat flap features a 4-way locking system, allowing you to control your pet's access. It is suitable for both small dogs and cats, and is designed for easy installation in any wall or door up to 50mm thick. Technical specifications Size: XL: 25 x 5.5 x 27.7 cm Material: Hard plastic Installation Tools needed: Electric drill, iron saw or electric saw, measuring ruler Step 1: Draw the size of the door cover on a piece of paper (allow for a few millimeters error) Step 2: Mark the drawing on the door and outline it with a pencil Step 3: Drill holes in the four corners of the marked area, then cut out the hole Step 4: For glass doors, use a glass scribing tool and secure with glass glue Step 5: Clean the hole and wrap it with wooden leather for aesthetics Step 6: Install the cat flap using the provided screws Step 7: Cover the screw ports with the screw covers Usage 4-way