[General]: Double spanners accept standard 5/16-7/8 or 8-22mm nuts and bolts. Suitable for removing bolts of different specifications. Different sizes meet your different maintenance needs. [Workmanship]: Full heat treatment, hardness up to HRC60, high quality CR-V forged steel, high torque, long service life . [Design]: Extra long design provides extra leverage, which is easier and more economical than other socket wrenches on the market. Two different colors meet your different choices. [Application]: Suitable for various related maintenance industries, such as automobile/mechanical/bicycle/motorcycle maintenance, etc. This is the best gift for craft lovers.