| 摘要 |
A drill extender apparatus having: (1) an rotary drive coupler providing, on one end, threaded engagement to the drive of a conventional electric drill and a polygonal shaped driven tool receptor cavity and locking collet at the other end; and (2) a tool extender, having drive shaft at one end, and a polygonal shaped driven tool receptor cavity and locking collet at the other end for receiving a tool, such a tool would include one of a set of drill bits, each having an extender shaft having a notched polyhedron shaft having multiple positions for drilling/boring deep holes, having multiple grooves adapted to be received by the quick disconnect collet of the tool extender wherein the balls selectively engage a groove for engaging said polygonal shaft and the polygonal shaped shaft is locked in place by the action of the polygonal cavity of said collet.
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