Abstract: The present invention provides a socket-engaging tool set having a plurality of elongated socket-engaging tools assembled together in a concentric arrangement. Each socket-engaging tool may generally have a constant outer cross-sectional size and shape along most or all of its length, and the outer cross-sectional shape may be hexagonal such that the socket-engaging tools are a plurality of concentric hex keys. Biasing springs may be provided to bias the positioning of one or more concentric socket-engaging tool(s) in the absence of an external force that might overcome such biasing. An external force may be used to cause selective retraction/extension of one or more socket-engaging tool(s) to create a common distal end of desired size. A device may include an adjustment mechanism(s) to manually affect the positioning of the one or more socket-engaging tool(s). Methods are also provided for the assembly and operation of a device of the present invention.

Abstract: The present invention provides a socket-engaging tool set having a plurality of elongated socket-engaging tools assembled together in a concentric arrangement. Each socket-engaging tool may generally have a constant outer cross-sectional size and shape along most or all of its length, and the outer cross-sectional shape may be hexagonal such that the socket-engaging tools are a plurality of concentric hex keys. Biasing springs may be provided to bias the positioning of one or more concentric socket-engaging tool(s) in the absence of an external force that might overcome such biasing. An external force may be used to cause selective retraction/extension of one or more socket-engaging tool(s) to create a common distal end of desired size. A device may include an adjustment mechanism(s) to manually affect the positioning of the one or more socket-engaging tool(s). Methods are also provided for the assembly and operation of a device of the present invention.