Our strongest WearTuff screen is tear resistant and provides extra durability against active pets, while still allowing reversible ventilation options. It features a commercial-grade closer with a built-in torsion bar to prevent over extension, a heavy duty handle, and a five-hinge system. Solid-core door with maintenance-free surface for age and weather resistance.Tear resistant WearTuff screen is reversible for top or bottom ventilation.High traffic 5 hinge system is standard.FlexGuard closer protects door when over-extended and allows door to open past 90 degrees.Strong-hold handle with keyed lock for added security.The adjustable expander conforms to uneven sills for a tight fit.EasyHang installation is faster and easier than traditional methods.