[Material] Screwdriver socket is made of high quality chrome vanadium steel. It has high hardness, good wear resistance, oxidation resistance and fracture resistance. It resists high bending stresses. The screwdriver bit is extremely durable. [Different Sizes Driver Bit] 9 different sizes, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm screwdriver bits to meet all your needs and match your tools perfectly. This screwdriver socket adapter has different sizes and shapes to match your tool for you to choose. [Easy to Install and Disassemble] The strong magnetism of the socket bit can be perfectly matched with your tool, adjustment quick, less wear, easy installation and super strong magnetic force features make the socket set easier to use. [Widely Applications] This screwdriver socket holder is widely used in the home , DIY, car repair, auto repair, appliance repair, large machinery maintenance. Suitable for screwdriver socket such as electric screwdrivers, drill bits, pneumatic screwdrivers, air drills, hand screwdrivers, etc. The nut drill set is constructed of chrome vanadium steel, which can provide high hardness and corrosion resistance. Note: The data is manual measurement, please allow 1-18cm error, due to the light and screen differences, there are will have a certain color difference, the specific received in kind prevail.