Abstract: A torque-limiting tool which comprises a drive member and a driven member. A plurality of balls extends from one of the members; a corresponding plurality of cylinders extends from the other. The relationship of the drive member and the driven member is such that when a torque is applied to the drive member, the balls and the cylinders engage and drive the driven member until a predetermined torque is applied. Once this torque is attained, the balls and cylinders mutually rotate so as to release the driven member. A calibration screw adjusts the overlap between the balls and cylinders to calibrate the limiting torque.

Abstract: A ratchet reversing mechanism of the shifting pawl type is operated by a reversing apparatus which is confined to a small arcuate segment of the work-turning member, leaving space over the work-turning member for a quick-release mechanism and for attachment of a speeder ring. A switching ring lies over the pawl and includes a spring-receiving recess which positions a compression spring in a radial plane above the pawl, one end of the spring engaging the pawl and the other end of the spring engaging the switching ring at a location radially outwardly of the engagement with the pawl, such that the spring extends only over the segment of the work-turning member defined by the recess in the work-turning member which receives the pawl. A second pawl is provided in another embodiment of the invention.