Strong Hand, 3-Axis Fixture Vise with Quick Acting Screw, Two Stand-Offs,"Swing Away" Arm with 4.75-Inch Miter Joint, 3.92-Inch T-Clearance - WAC45-SW With a push of the buttons, quick-acting screws slide in and out When buttons are released, threads re-engage for tightening Setup allows user to leave parts in position during cool down, minimizing possible distortion due to contraction When job is finished, third axis arm swings out of the way for easy part removal Axis arm is curved for greater workpiece clearance