Description: Models: Rivet nuts are sorted into grids in sturdy storage boxes to help you quickly find the rivet nut model you want. Including M3, M4, M5, M6, M8, M10, #8- 32, #10-24, 1/4"-20, 5/16"-18, 3/8"-16.Durable Material: The rivet nuts are made of stainless steel, which has excellent rustproof and wear resistant, keeping it reliable and durable.Versatile Use: Suitable for various applications, these nuts can be used in home DIY projects, professional machinery, automotive repairs and more.Sturdy Storage Box: Comes with two durable and convenient storage boxes to store all your rivet nuts and keep them organized.Portable: These nuts set is lightweight, very convenient to carry. Specification: Material: Stainless Steel Size Chart: M3: 5mmx9mm/0.20inchx0.35inchM4: 6mmx11mm/0.24inchx0.43inchM5: 7mmx13mm/0.28inchx0.51inchM6: 9mmx15mm/0.35inchx0.59inchM8: 11mmx18mm/0.43inchx0.71inchM10: 13mmx21mm/0.51inchx0.83inch8-32: 6.6mmx13mm/0.26inchx0.51inch10-24: 6.8mmx13.5mm/0.27inchx0.53inch1/4"-20: 8.8mmx15mm/0.35inchx0.59inch5/16"-18: 10.8mmx18mm/0.43inchx0.71inch3/8"-16: 13.2mmx18.5mm/0.52inchx0.73inch Package Includes: 85pcs M3 Rivet Nuts80pcs M4 Rivet Nuts50pcs M5 Rivet Nuts15pcs M6 Rivet Nuts8pcs M8 Rivet Nuts6pcs M10 Rivet Nuts45pcs 8-32 Rivet Nuts42pcs 10-24 Rivet Nuts35pcs 1/4"-20 Rivet Nuts8pcs 5/16"-18 Rivet Nuts6pcs 3/8"-16 Rivet Nuts Note: Please allow slightly errors due to manual measurement and different monitors.