Gutter guards hinged mill finish Made of galvanized steel. Convex design prevents debris accumulation. Will not collapse under ice, snow, or debris. No tools needed for installation. 3 feet sections fit any standard"K" style gutters. Hinges clip to the front of the gutter. Helps prevent lea ves, twigs, and other debris from falling into the gutters and clogging both the gutters and downspouts.