In at least one illustrative embodiment, a tool may comprise an output shaft configured to rotate about an axis, the output shaft including a socket mount having a tip and a solid root, and a socket retainer including (i) a retaining pin coupled to the tip of the socket mount and configured to move perpendicularly to the axis between a releasing position in which the retaining pin is located entirely within a first space formed in the tip and a retaining position in which the retaining pin extends outwardly through a first aperture formed in the tip and opening to the first space and (ii) a release pin coupled to the tip of the socket mount and configured to move along the axis to cause the retaining pin to move between the releasing position and the retaining position.