5 / 16X3 / 4inch precisely size, suitable for various screen window frames Very suitable for repair and door and window processing scenarios, allowing users to easily meet various installation needs It is used to splices the four corner of screen window frame, which plays a role in fixing and strengthening, making the corner connection of window frame firmer, not easy to loosen and deform, and Right Angles buckle design, none tool assistance required, can be assembled by hand, simplifying process of screen window assembly Make of high strength, it has excellent resistance to aging and Long term outdoor use without deformation