Remote driving tool with tubular lock feature

In combination a hand held, remote driving tool, and a rotatable working head for hanger wire twisting at a distance otherwise beyond the reach of the tool operator, said tool comprising a rigid axially elongated annular driver member defining means for coupling to a power drill, and a rigid, axially elongated annular driven member carrying said working head at its remote end for driving by said drill, and an intermediate member into opposite ends of which said driver member and said driven member are fitted at respective predetermined locus of coextension;

• cooperating, locally out-of-round, axially extended sections on said fitted members within said predetermined locus defining a diametrical difference between the members whereby said cooperating sections will not mutually pass each other on relative rotation of the members but will bind said members selectively in a predetermined axially aligned and interfitted condition of said members and in a manner normally tending to release of the members by pivoting relative to each other in response to side loading forces on one or both of said members in the use of the tool, and separately formed skirt means attached to the driver member defining a skirt extension thereof in snug but slidable engagement with the driven member beyond said predetermined locus a distance enabling said skirt extension to block pivoting of said members from their predetermined axially aligned and interfitted condition and thereby prevent unbinding.