Look at almost any aluminum screen door or storm window, and you’ll probably see a fair number of stripped-out aluminum Phillips recess, pan head screws. Even worse, you’ll probably see rusted, zinc plated steel screws holding together aluminum door parts! The advantages of the Square Drive screw become increasingly apparent in soft materials like aluminum. These screws are great for repairing those aluminum screen doors and window frames, mounting running lights on recreational vehicles, even screwing together gutters. Made in USA of 2024-T4 alloy.