High quality 304 stainless 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. The Threaded Screws are arranged in a storage box, which makes it easy for you to find the series and avoid 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, cocking repair, plumber and other small repairs around the b Design Hex Socket Cap design, can easily be driven by allen keys and not easy to slip. It also has a thin edge which could dig into the contact surface for a grip secure on a wide range of surfaces. Material High quality 304 stainless steel. Stainless steel is a common material with a specific gravity of 7.93 g/cm3, also called 18/8. It has good workability and high tenacity up to a temperature of approximately 800 degrees. Dimension< /p> M2.5*3----20Pieces M2.5*4----20Pieces M3*3------20Pieces M3*4------20Pieces M3*10----20Pieces M4*4----20Pieces M4*6----20Pieces M4*8----20Pieces M5*5----20Pieces M5 *8----20Pieces M6*6----20Pieces M8*8----20Pieces M5*10--- 20Pieces M6*10----20Pieces M8*12----20Pieces Application Suitable for handles door, faucet, light fixture, knobs, armament repair, plumber and other small repairs around the shop, garage or home. getveryrich