Tool locking mechanism

A tool assembly, comprising:

• a. a driver defining a bore, the bore including at least one inwardly depending rib;
• b. a tool having,
• a first working end,
• an opposite second end that is received through the bore defined by the driver,
• a central axis extending between the first working end and the opposite second end,
• at least one axial recess formed on an outer surface of the tool, and a bore formed in the opposite second end transverse to the central axis;
• c. a cap rotatably received on the opposite second end, the cap comprising at least one recess formed on an annular outer surface thereon and at least one recess formed in a bottom surface facing the tool,
• d. a pin positioned in the opposite second end transverse bore and the cap bottom surface recess;
• and
• e. a spring disposed in the cap bottom surface recess, the spring being operatively connected to the cap and at least one end of the pin,
• wherein the cap is rotatable between
• a first position in which the at least one cap recess aligns with the at least one tool axial recess, and
• a second position in which the at least one cap recess is out of alignment with the at least one tool axial recess.