US Patent 9533404 Wrench with maximum operational torque

A wrench includes a body and a rod pivotably received in a first end of the body. A pressing device is mounted in the rod and presses against the body. A handle includes a shank and a connection end pivotably connected to the first end of the body. When the handle is in a coaxial position, the shank protrudes beyond an outer face of the first end. A longitudinal axis of the shank is coincident to the working axis. The shank can be rapidly rotated by fingers of a user. When the handle is in a storage position, the shank is received in a groove in the outer face. A palm of the user can grip and rotate the body without hindrance by the shank.