Hand tool with slide adjustment for locking flexible head

A hand tool comprising:

• a head portion configured to interface with a fastener;
• a shaft having a grip portion at which an operator is enabled to hold the hand tool during operation;
• and
• a flexible interface configured to operably couple the shaft and the head portion in a locked state and an unlocked state, and to enable the head portion to pivot relative to the shaft about a pivot axis that extends substantially perpendicular to a direction of extension of the shaft,
• wherein, in the unlocked state, an angle of the head portion is pivotable relative to the pivot axis and, in the locked state, the angle of the head portion is fixed,
• wherein the flexible interface comprises a retention assembly and a locking assembly including an actuator and a locking pin,
• wherein the actuator is disposed in an actuator cavity, the actuator cavity comprising a locking channel and a retaining channel,
• wherein the retaining channel extends in a direction substantially parallel to the pivot axis,
• wherein the actuator is configured to move in a direction substantially perpendicular to the pivot axis to operate the locking assembly to transition between the locked state and the unlocked state, and configured to move in the direction substantially parallel to the pivot axis to operate the retention assembly to retain hand tool in the unlocked state, and
• wherein the locking pin comprises an actuation slot comprising a retaining slot that extends substantially parallel to the retaining channel.