Features 1、[Deep Thread] The thread is clear and deep, the fixing is firm, the surface is smooth and burr free, and the workmanship is exquisite. 2、[Carbon Steel Material] Carbon steel is rust proof, has high strength, does not deform, can be used for a long time, and is environmentally friendly and pollution free. 3、[Various Specifications] The set includes screws, nuts and washers of various sizes and specifications, which you can use as needed. 4、[Wide Application] This set of screws and nuts is suitable for professionals, hobbyists, repairmen and other DIY scenarios. 5、[Easy to Store] This screw and nut set comes with a storage box that helps you keep small fasteners organized so they won't get lost. Specification Item Type: Screws Washers Nuts Assortment Kit Material: Carbon steel Specifications: 1 x M2 hex wrench, 1 x M3 hex wrench, 1 x M4 hex wrench, 1 x M5 hex wrench 45 x M5 washer, 45 x M5 nut, 10 x M5 x 20mm screw, 10 x M5 x 16mm screw, 10 x M5 x 12mm screw, 10 x M5 x 8mm screw 45 x M4 washer, 45 x M4 nut, 10 x M4 x 20mm screw, 10 x M4 x 16mm screw, 10 x M4 x 12mm screw, 10 x M4 x 8mm screw 85 x M3 washer, 85 x M3 nut, 20 x M3 x 20mm screw, 20 x M3 x 16mm screw, 20 x M3 x 12mm screw, 20 x M3 x 8mm screw 125 x M2 washer, 125 x M2 nut, 30 x M2 x 20mm screw, 30 x M2 x 16mm screw, 30 x M2 x 12mm screw, 30 x M2 x 8mm screw Package List 1 x Storage Box 4 x Hex Wrench 300 x Washer 300 x Nut 280 x Screw