Abstract: A grip for a shaft is provided. The grip includes an elongated tubular body having an axis, an outer surface on the body including a polygonal outer surface portion which is polygonal in transverse cross section defining flats joined at vertices and an inner surface on the body including a first inner surface portion opposite the polygonal outer surface portion. The first inner surface portion has a plurality of longitudinally extending grooves respectively disposed parallel to and in radial alignment with the vertices of the polygonal outer surface portion, whereby when the grip is disposed on the shaft and a user's hand applies pressure to one of the vertices, that vertex will flex inwardly toward the shaft thereby relieving pressure on the user's hand.

Abstract: A torque control tool driver having a torque responsive clutch which holds a rotatable ring gear of a motor driven reduction gear train stationary to effect rotation of a tool driving spindle and which is operable in the presence of pre-determined torque output of such spindle to automatically release the ring gear for rotation whereby to disconnect the spindle from the driving motor. Following spindle disconnect, the driving motor is automatically deenergized in response to rotational movement of the ring gear.