The Hydroshield EZ Smooth Flow Gutter Guards are an effective and simple-to-install aluminum gutter guard. Reducing the need to clean your gutters, the Hydroshield EZ Smooth Flow will heavily reduce the need to clean your gutters. With thousands of holes, the rain water passes through the canals, making it E-Z for air flow to dry the debris and blow it away. Hydroshield backs the Hydroshield EZ Smooth Flow gutter guard with an optional 5 year “peace of mind warranty”. To install, simply Lay the Hydroshield E-Z-Smooth Flow in the gutter and screw to the front of the gutter. E-Z-Smooth Flow has two optional install methods:First, after E-Z-Smooth Flow is screwed to the front gutter hem, the installer can screw through the cover in each hanger. This helps reduce the chance of heavy snow or ice ripping the gutter hem or hanger. Second, the installer can use 1.5” screws through holes in the rear vertical wall of E-Z-Smooth Flow into fascia. The Smooth has 3 bags , 50 ct each for 150 total of #6 ? head stainless steel self-tapping screws. Like all gutter protection products, depending on your debris type and load, E-Z-Smooth Flow will require maintenance from time to time, by brushing off the top of the panels.