Starting position, with handle upright and clamping arm swung away for loading.
Twist handle (70º) to rotate the arm into clamping position.
Push handle downward (through 45º) to advance the arm to the workpiece. Continue pushing downward (45º to 135º) until full clamping force is applied.
Starting with the handle upright and the clamping arm swung away for loading, first twist the handle to rotate the arm into clamping position, then push the handle downward to lower the arm and apply clamping force. A small portion of the total vertical stroke is used to swing, and slightly advance the clamping arm, then the remaining stroke is available as the clamping range. Reverse the process to unclamp and return the arm to its original position for loading.