420pcs M3 Screw Kit, Premium M3 Bolts for 3D Printing, Hex Socket Head Cap Screw Assortment with Nuts and Washers, M3 x 6mm /8mm /10mm /12mm /16mm /20mm /25mm (Black)

Premium Quality: Made of 12.9 grade alloy steel, black oxide finish for high strength, corrosion resistance, and wear resistance. | Complete Specifications: Includes 7 popular screw sizes (M3x6mm, M3x8mm, M3x10mm, M3x12mm, M3x16mm, M3x20mm, M3x25mm), 20pcs each size, 140pcs screws in total. | Easy to Use: Hex socket head design for easy tightening with a hex wrench. | Versatile: Suitable for various applications, including 3D printing, woodworking, machinery repair, DIY projects, etc. | Convenient Storage: Comes with a plastic storage box for easy storage and organization.