Brass is an alloy of primarily copper and zinc. it is surprisingly strong but a very soft metal. and it is highly corrosion resistant and electric conductor. \n\nstandards: ansi, bs, din, jis etc. specifications: head type: flat head, oval head, round head, hex head\ndrive type: phillips, square, slotted, phillips /slotted, torx, pozi, hexagon diameter: #0 - #16 length: 1 /4" - 6", features: material: brass surface finish: self colour, pickling.