US Patent 7143670 Compact auxiliary positioning driver for wrench

A torque wrench having structure for facilitating manual rotation of the rotatable output shaft, for rotating the output shaft to an effective angular position which enables an internal ratchet mechanism to operate effectively. This structure preferably is a knurled thumbwheel which slip fits over the output shaft, which is preferably a removable bit. The wrench includes a handle, socket for receiving a bit, and an internal ratchet. The bit is configured to drivably engage the thumbwheel, and to present a non-circular distal terminal for engaging and driving a fastener. Optionally, the thumbwheel is removably secured to the bit by friction fit or in other ways.