[Material] Screwdriver socket is made of high quality chrome vanadium steel (CR-V). It has high hardness, good wear resistance, oxidation resistance and fracture resistance. It withstands high stressesof bending. The screwdriver socket is extremely durable. [Different Sizes Screwdriver Socket] 10 different sizes, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm screwdriver bit to meet all your needs and match your tools perfectly. screwdriver socket has differentsizes 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, the quick adjustment, the features less wear, easy installation and very strong magnetic force make the set of socketseasier to use. [Widely Applications] This screwdriver socket holder is widely used in household, DIY, auto repair, auto repair, appliance repair, large machinery maintenance. Suitable for screwdriver sockets suchsuch as electric