Specification: Size Name:1080 Pcs Hex Socket head Cap Screws Nuts; Screws Type: Hex Socket Head Cap Screws. Size: M2 M3 M4 (Include M2 M3 M4). Material: 304 Stainless Steel. Density: 7.93 g/cm^3 Heat-Resistant up to 800 degrees centigrade,also nice rust and high tenacity quality. Quantity: 1080PCS. Package Content: 1.Three Free Hex wrenches Included: Name:Size; M2 Hex Wrench 1.5mm:16*45mm; M3 Hex Wrench 2.5mm:19*55mm; M2 Hex Wrench 3.0mm:23*57mm; 2.M2 Screws;Nuts;Washers: Name:Type; Size; Quantity; Screws:M2; 5/32"; 20Pcs; Screws:M2; 1/4"; 20Pcs; Screws:M2; 5/16"; 20Pcs; Screws:M2; 29/64"; 20Pcs; Screws:M2; 5/8"; 20Pcs; Screws:M2; 25/32"; 20Pcs; Nuts:M2; 120Pcs; Washers:M2; 120Pcs; 3.M3:Screws;Nuts;Washers: Name:Type; Size; Quantity; Screws:M3; 5/32"; 20Pcs; Screws:M3; 5/16"; 20Pcs; Screws:M3; 29/64"; 20Pcs; Screws:M3; 5/8"; 20Pcs; Screws:M3; 25/32"; 20Pcs; Screws:M3; 19/16"; 20Pcs; Nuts:M3; 120Pcs; Washers:M3; 120Pcs; 4.M4 Screws;Nuts;Washers: Name:Type; Size; Quantity; Screws:M4; 1/4"; 20Pcs; Screws:M4; 3/8"; 20Pcs; Screws:M4; 9/16"; 20Pcs; Screws:M4; 23/32"; 20Pcs; Screws:M4; 25/32"; 20Pcs; Screws:M4; 19/16"; 20Pcs; Nuts:M4; 120Pcs; Washers:M4; 120Pcs; Features a.High Quality 304 Stainless Steel Hex Socket Head Cap Screws bolts Nuts Flat Washers Kit. We also provide three free relevant wrenchs in our sets. b.Many various sizes of M2 M3 M4 screws with matching nuts and flat washers meet different people’s demands, the necessity of your home life. c.Nuts and flat washers expand the contact area and reduce the pressure in order to protect the screws and parts. d.Everything is very organized and decent in the case. The case is very easy to open and close. e.This kit can be widely used in all kinds of precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc. Package Quantity: 1×1080PCS Hex Socket bolt and nuts