A fast wrench, belonging to hardware tools. It includes a base with a reversing disc cavity and a ring gear around the cavity wall, and the upper part of the ring gear is fluted disc cavity;

The outer wall of the base is a central toothed rod hole handle connecting base, the tooth rod hole extends to fluted disc cavity, and there is one at the end of handle connecting base for lining spring coil groove, corresponding to spring coil ball hole with a ball;

A reversing plate with central shaft holes, reversing block slot and Square joint placed in the cavity of the reversing plate; The reversing block that is pivoted on the reversing block slot, and the teeth on it cooperate with the ring gear; A fluted disc which is located in the fluted disc cavity and is solid with the reversing plate and has a knob cavity; A reversing knob in the knob cavity, whose central shaft is inserted into the central shaft hole of the reversing plate, the two top pins on the central shaft are in contact with the two reversing blocks; One plug is placed on the handle connecting base with ball groove, gear handle, ball groove with ball imbedded, gear with fluted disc.