Material:302, 303, 304, 305,316, 410, 550 Length: 6.5mm-220mm Dia : #6--#14 Head type: Pan , Flat , bugle, Pan washer, Hex, Hex washer, hex flange, T-head... Drive: phillip, pozi, square, slot, torx¡ Standard: DIN JIN ANSI GB #12 410 self drilling screws can drill steel pannel 12mm and stainless steel plate (eg 304 pannel)5mm.