Easy to Install:The knurled nut design makes it easier to insert the workpiece. There is no need to punch internal threads and no weld nuts. Prumium Material:Made of galvanized carbon steel, high strength, oxidation and corrosion resistance. Easy to Store:With a plastic storage box, easy to carry and store. Wide Application:It can be installed on steel, plastic, glass fiber and other materials. Package Included: 300PCS Rivet Nuts Kit Size As Follow: 50pcs x 6-32 Rivet nuts 30pcs x 8-32 Rivet nuts 25pcs x 10-24 Rivet nuts 25pcs x 10-32 Rivet nuts 20pcs x 1/4-20 Rivet nuts 50pcs x M3 Rivet nuts 40pcs x M4 Rivet nuts 30pcs x M5 Rivet nuts 20pcs x M6 Rivet nuts 10pcs x M8 Rivet nuts Features: Strong, sturdy, and corrosion resistant. Not easy to rust, very durable. Rivet nuts can be installed in many different kinds of material including steel, plastic and fiberglass, etc. Specification: Material: Zinc Plated Size: 6-32, 8-32, 10-24, 10-32, 1/4-20, M3, M4, M5, M6, M8 Quantity: 300 pieces