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. Different 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 20 pieces, to meet different needs. It is a very essential hand tool for the family The threaded screws are arranged in a storage box, which makes it easy for you to find your way in the series and prevent 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 secure grip on a wide range of surfaces. Application:Suitable for door handles,faucet,light fixture,knobs,armament repair,plumber and other small repairs around the shop, garage or at home. DimensionQuantity M2.5*3---20Pieces M2.5*4----20Pieces M3*3-----20Pcs M3*4------20Pcs M3*10----20Pcs M4*4----20Pcs M4 *6-----20Pcs M4*8----20Pcs M5*5-----20Pcs M5*8----20Pcs M5*10 ----20Pcs M6*6----20Pcs M6*10----20Pcs M8*8----20Pcs M8*12---- 20Pieces Material High quality carbon steel. It has good workability and high toughness up to a temperature of 100%. about 800 degrees. Anti-rust Corrosion resistance Pollution-free Product quality Material Premium High hardness Application Suitable for door handles, faucet, light fixture, buttons, weapon repair, plumber and other small repairs around the shop, garage Sold by the grid cool store