This zinc plated Phillips pan head sheet metal screw is a #10 x 1-1/4 in. size, packed 100 per box. Sheet metal screws are designed to join metal to metal and can also attach metal to wood, fiberglass and plastic. Sharp threads draw materials together for a secure hold, and the zinc plating offers moderate protection against rust and corrosion. For installation, drill a hole in the material that matches the diameter of the screw.