Adjustable socket-engaging tool set

A socket-engaging device comprising:

• a plurality of socket-engaging tools, each of the socket-engaging tools having a proximal end and a distal end, the plurality of socket-engaging tools being assembled together in a concentric arrangement, wherein each of the socket-engaging tools has a constant outer cross-sectional size and shape along most or all of its length, the plurality of socket-engaging tools comprising an outermost socket-engaging tool and one or more inner socket-engaging tools, the one or more inner socket-engaging tools comprising an innermost first socket-engaging tool;
• a holder, the holder having a proximal end and a distal end, wherein the holder at least partially surrounds the plurality of socket-engaging tools, and wherein the outermost socket-engaging tool is fixedly attached to the holder, the distal end of the outermost socket-engaging tool projecting outwardly from the distal end of the holder;
• at least one biasing spring, the at least one biasing spring comprising a first biasing spring, wherein the first biasing spring is positioned within a cavity of the holder between a proximal end piece of the first socket-engaging tool and the proximal end of a next larger socket-engaging tool, the first socket-engaging tool being biased to a more proximal position by the first biasing spring;
• and
• a threaded adjusting shaft, the threaded adjusting shaft being engaged with a threaded bore of the holder spanning from the proximal end of the holder to the cavity inside the holder, wherein the threaded adjusting shaft has a distal contacting portion that engages the proximal end piece of the first socket-engaging tool;
• wherein the one or more inner socket-engaging tools are positioned concentrically within a longitudinal bore of the outermost socket-engaging tool, each of the one or more inner socket-engaging tools being able to move independently along its longitudinal axis relative to the outermost socket-engaging tool,
• wherein the engagement between the threaded adjusting shaft and the threaded bore of the holder causes proximal or distal movement of the threaded adjusting shaft depending on the direction of rotation of the threaded adjusting shaft relative to the holder, and
• wherein the proximal biasing of the first socket-engaging tool by the first biasing spring is opposed by the distal contacting portion of the threaded adjusting shaft when the distal contacting portion is engaged with the proximal end piece of the first socket-engaging tool.