Product Description HILLMAN" STAINLESS STEEL SHEET METAL SCREWS No.12 x 1"Flat head Stainless steelSheet metal screwsPhillips Boxed/100" . From the Manufacturer These sheet metal screws, or tapping screws, are highly versatile and are used to attached metal, wood, fiberglass, and plastic. The sharp threads draw material together and ensure a secure hold. Sheet metal screws are fully threaded with a sharp point.