Feature 1 High quality carbon steel material make sure the durability of the product. 2 Great workmanship, perfect replacement for the old or damaged one. 3 Including different standard screws and nuts, easy to operate. 4 This is a DIY kits with installation tools for quick and easy using. 5 There is a storage box which it is convenient to carry. Features: 1. High quality carbon steel material make sure the durability of the product. 2. Great workmanship, perfect replacement for the old or damaged one. 3. Including different standard screws and nuts, easy to operate. 4. This is a DIY kits with installation tools for quick and easy using. 5. There is a storage box which it is convenient to carry. Specification: Condition: 100% Brand new Item Type: Screw, Nut Material: Carbon Steel Thread Standard: M3/M4/M5 Package Size: Approx. 17.5 x 10.5 x 2.5cm / 6.9 x 4.1 x 1in Package List: 30 x Black Carbon Steel Flat Head Hex Socket Screw M3x8 30 x Black Carbon Steel Flat Head Hex Socket Screw M3x12 30 x Black Carbon Steel Flat Head Hex Socket Screw M3x16 30 x Black Carbon Steel Flat Head Hex Socket Screw M3x20 20 x Black Carbon Steel Flat Head Hex Socket Screw M4x8 20 x Black Carbon Steel Flat Head Hex Socket Screw M4x12 20 x Black Carbon Steel Flat Head Hex Socket Screw M4x16 20 x Black Carbon Steel Flat Head Hex Socket Screw M4x20 10 x Black Carbon Steel Flat Head Hex Socket Screws M5x8 10 x Black Carbon Steel Flat Head Hex Socket Screws M5x12 10 x Black Carbon Steel Flat Head Hex Socket Screws M5x16 10 x Black Carbon Steel Flat Head Hex Socket Screw M5x20 100 x Black Carbon Steel Hex Nut M3 80 x Black Carbon Steel Hex Nut M4 40 x Black Carbon Steel Hex Nut M5