Automatically adjusts for different workpiece thicknesses. Clamps with the same, repeatable force anywhere within its 1/2" automatic-adjustment range. Ideal for welding fixtures, machining fixtures for castings, fixtures holding several part sizes within the same family, or any other application where part size can vary. Fits in the same space, and provides the same clamping force as the same-size standard toggle clamp. Open arm provides adjustable spindle location. Arm opens 87° while handle moves 80°.