Patent ID: 7484427

Claim:
A manual tool for providing a torque limited force on a threaded aperture, said tool comprising; a. a shaft, said shaft being substantially cylindrical with a first end and a second end, said shaft further having an opening for a threaded member at said first end, said shaft further having a plurality of magnets spaced around the circumference of the shaft at a given axial point of the shaft; b. a body including an interior portion defining a cylindrical opening for receiving said shaft therein, and an outside gripping portion, said body further comprising a second plurality of magnets spaced around the circumference of the interior cylindrical opening at a given axial point of the body; wherein the body and the shaft are magnetically engaged to one another by said plurality of magnets and said second plurality of magnets such that rotation of said gripping portion provides a rotational force to a threaded member at said first end of the shaft, and said plurality of magnets and said second plurality of magnets disengage and permit the shaft to rotate within the body when the torque force on the threaded member exceeds a preselected limit.