Made of high quality carbon steel. Stainless steel is a common material with a density of 7.93 g/cm3, also called 18/8. It features good workability and high toughness up to a temperature of about 800 degrees. Various sizes Threaded screws: M2.5*3, M2.5*4, M3*3, M3* 4,M3*10,M4*4,M4*6,M4*8,M5*5,M5*8,M5*10,M6*6,M6*10,M8*8,M8*12,Each 20Pieces,for meet different needs.It is a very essential manual tool for the family Threaded screws are arranged in a storage box, which makes it easy for you to find the series and avoid the loss when needed. Hex Socket Cap design, can easily be driven by allen keys and does not slip easily, it also has a thin edge that could dig into the contact surface for a secure grip on a wide range of surfaces. Application: Suitable for door handles, faucet, light fixture, knobs, fitting repair, plumber and other small repairs around the shop, garage or home.< /p> DimensionQuantity M2.5*3---20Pieces M2.5*4----20Pieces M3*3-----20Pieces M3*4------20Pieces M3*10----20Pieces M4*4----20Pieces< /p> M4*6-----20Pieces M4*8----20Pieces M5*5-----20Pieces M5*8----20Pieces M5*10----20Pieces M6*6----20Pieces M6*10----20Pieces M8*8----20Pieces M8*12----20 Pieces Material High quality Carbon Steel. It features good workability and high toughness up to a temperature around 800 degrees. Anti rust Corrosion resistance Pollution-free Product Quality < p>Premium material High hardness Application Suitable for door handles, faucet, light fixture, knobs, armament repair, plumber and other small repairs around the shop, garage