Product DescriptionThe kit contains 10 popular sizes M3-M8: 30pcs M3 0.5 3, 30pcs M3 0.5 4, 30pcs M3 0.5 6, 30pcs M4 0.7 4, 20pcs M4 0.7 6, 20pcs M5 0.8 5, 20pcs M5 0.8 8, 20pcs M6 1 6, 20pcs M6 1 10 and 20pcs M8 1.25 8. All screws are arranged in a durable clear plastic box with a specification label. The box can also be used as a storage boxNOTEProducts contain small parts, never let children play to avoid inadvertent ingestions.Please allow an error of 1 to 5. 3mm due to manual measurement. Thank you for your understanding.Specifications:-Materials: Alloy steel; Grade 12.9-Color: Black-Box Size: 132 70 20mm-CONTENTS:Threaded; see No screws Length QuantityM30.53 30pcsM30.54 30pcsM30.56 30pcsM40.74 30pcsM40.76 20pcsM50.85 20pcsM50.88 20pcsM616 20pcsM6110 20pcsM81.258 20pcsHigh quality The hexagon socket screws are made of high quality alloy steel. The alloy steel material exhibits and provides good resistance to corrosion. corrosion in bad environment, such as high temperature, cold weather and humid areas. They have a resistance greater than rust and excellent corrosion resistance. oxidation, which can ensure a long service lifeRead MoreSafetyOur hexagon socket screws adopt high quality material, protection environmental and non-toxic. In the process of use, there are no toxic substances to be consumed. free to ensure your safetyWide applicationScrews are ideal for professionals and DIY enthusiasts. They also work well for 3D printed projects. The kit is perfect for replacing losses and lost. Can be used on sheet metal and wood. A variety of sizes to meet the maximum your needs