The gutter guard is made of high-strength polypropylene, will not rust or corrode, strong and durable. The gutter drain can be used to block leaves and debris while allowing water to be carried through the gutter to the downspout. The mesh holes can effectively filter water and other sundries, and help to reduce overflow and prevent your sewer from blocking. You can cut the guard and clips any way you like with regular scissors to fit the shape of the gutter.