Product Description Design Hex Socket Cap design, can easily be driven by allen keys and does not slip easily. It also has a thin edge which could dig into the surface of contact for a secure grip on a wide range of surfaces. Material High quality 304 stainless steel. Stainless steel is a common material with a density of 7.93g /cm3, also called 18/8. It has good workability and high toughness up to a temperature of about 800 degrees. Dimension M2.5*3-- --20Pieces M2.5*4----20Pieces M3*3------20Pieces M3*4------20Pieces M3*10-- --20pcs M4*4----20pcs M4*6----20pcs M4*8----20pcs M5*5----20pcs M5* 8----20Pieces M5*10---20Pieces M6*6----20Pieces M6*10----20Pieces M8*8----20PiecesM8*12----20 Pieces Application Suitable for door handles, faucet, light fixture, knobs, armament repair, plumber and aut res small repairs around the shop, garage or home.