EASY INSTALLATION: The stair gate does not require drilling, it can also be drilled if you want to fix it permanently. We have two installation methods to easily install the dog flap. Upgraded design: cross fixed corners, edge jacquard design, stronger three-dimensional effect, stronger stair door; thicker material to prevent dog bites. Fixed Telescopic Tube: Stainless steel tube is used to fix the ground to prevent dogs from digging holes and jumping into the ground, preventing pets from jumping easily. Color: Black Excellent dog bar: suitable for separating hallways, kitchens, bathrooms, bedrooms, stairs. It folds into a small package that doesn’t take up space.