1705 Pcs Machine Screw Assortment Kit, M2 M3 M4 M5 Metric Bolts And Nuts Kit ? ALLOY STEEL MACHINE SCREWS?1705Pcs well-engineered machine screw assortment with sixteen different sizes and lengths of bolts. They are alloy steel, good black coating, no burrs, perfect fit among screws, nuts, lock flat washers. ?HEX BUTTON HEAD METRIC SIZES?16 most common selections of hex button head screws, and metric size nuts, screws and washers M2-M5 with allen wrenches. This large selection of small to large nuts and bolts also comes in a hardy case for easy orgnization and identification. ?TIME MONEY SAVER?The screws are machined well and they have been organized into handy separate compartments. Included on the cover is a chart which directs you to the compartment and size of the hardware you're looking for. Compared to the time it takes to go to a hardware store and the cost of buying single screws, this screw set is a time and money saver. ?HANDY NECESSITY KIT?The nuts thread on the machine screws perfectly, and all the common screw sizes is typically needed for a regular household and professional mechanic, widely used in small fixtures around the house and garage, 3d prints and rc car parts. This metric screw assortment is a great option for various DIYer needs.