SELF DRILLING SCREWS ,wood screws all kinds of screws ,self drilling screws ,self tapping screws ,drywall screws.wood screws ,water-proof cap,metal/pvc complex wahser.dia: 0.15---1.0mmlength:15---200mmfinshing:ziec plated ,color zinc,black ,and etc.standrad: DIN ANSI ISO GB FAQ self drilling wood screws DIN7504