[1993-10-26]


A wrench includes a positioning device for engagement with an object to be driven in order to retain the object in place relative to the head portion of the wrench. The positioning device includes a protrusion formed on the head portion, a depression formed in the protrusion, a spring and a stub received in the depression. The stub is biased outward of the protrusion for engagement with the object.  Link to USPTO.


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