We have commodity security services. If the product you received has quality problems, please feel free to contact us, we can provide you with a return service.Uses: Removable nut screws of various shapes, square head screws. Bolt head. Remove the screws, rotate the hooks, and remove the grub screws. Remove the irregular screws and remove the broken faucet. Tighten the knob.Use: Electric drill adapter. Professional-grade universal socket wrench set.High hardness chrome vanadium steel forging.Overall heat treatment hardness, high torque, high toughness, long service life.Honeycomb PrincipleDouble hexagonal design, the hexagon in the middle and the hexagon of the tube side play the card position when the nut is stuck into the sleeve, forming the support point to eat the nut tighter, the middle gap is small and the fastening is not easy to slip.Self-adjusting to accommodate thousands of fasteners.Precision polished, durable and resistant to rust.It is compact and easy to carry.Can be used in the automotive industry, home maintenance, manufacturing, construction and other industries.Automatic standards and metrics application.Honeycomb PrincipleEach pillar can be independently exercised scientifically designed to be durable.High hardness chrome vanadium steel forgingOverall heat treatment hardness, high torque, high toughness, long service life.Feedback & Return : 1.If you have any questions or need any help, please feel free to contact us! Thank you !2.We do try respond as quickly as possible.but please allow delay response Compatible with non-business time.we will be glad to answer any question you may have so please feel free to contact me.RM14101236631576493