A method and apparatus for clamping a workpiece in a vise. The apparatus generally includes a stationary jaw with a first gripping surface and a moveable jaw with a second gripping surface connected and operated by a spindle. The spindle moves the stationary jaw and the moveable jaw toward and away for each other when rotated. The vise includes an actuation rod configured to engage and disengage a semi-nut from the spindle thereby engaging and disengaging the moveable jaw from the fixed jaw in order to allow an operator to quickly move the moveable jaw by hand.