Description: 230Pcs M3 Stainless Steel Button Head Hex Socket Screw and Hex Nuts. Made of 304 stainless steel for durability and great corrosion resistance. Environment-friendly, no pollution, high hardness. Many length choice in one set meet daily basic needs Stored in a plastic case, easy to carry. Specification: M3 x 4mm 30pcs M3 x 6mm 30pcs M3 x 8mm 30pcs M3 x 12mm 30pcs M3 x 16mm 30pcs M3 x 20mm 30pcs M3 Hex Nut 50pcs Box Size: 130*67*22cm/5.11*2.63*0.86inch Package Includes: 1 Set M3 Screws and Nuts