Product Description Material 304 High quality stainless steel. It exhibits good workability; and a high t & eacute; nacity; up to a temperature of about 800 degrees. Anti rust Resistance to agrave; corrosion Without pollution Quality; Product Premium Material High Hardness Screw Size M3 * 6 M3 * 8 M3 * 10 M3 * 12 M3 * 16 M3 * 20–25 Pi & egrave; these each M4 * 6 M4 * 8 M4 * 10 M4 * 12 M4 * 16 M4 * 20–15 Pieces each M5 * 6 M5 * 8 M5 * 10 M5 * 12 M5 * 16 M5 * 20–10 Pieces each M3 washer M3 nut —— 150 Pieces each M4 washer M4 nut —– 90 Pieces each M5 washer M5 nut —— 60 Pieces each Accessories M3 wrench Hexagonal Allen-Diameter: 2.5mm Length: 19 * 55mm M4 wrench; Hexagonal Allen-Diameter: 3.0mm Length: 23 * 57mm M5 wrench; Hexagonal Allen-Diameter: 4.0mm Length: 24 * 65mm Warning: The products contain small parts. Please do not let children play to avoid accidental ingestion. Application The main use of the stainless steel hexagon screw is very common in electronics. For