Isn’t the workpiece going to move upwards, downwards or sideways when tightening the clamp?

The single-wedge clamps are designed to keep the workpiece steady in place allowing no upwards, downwards or sideways movement. Due to the clamps’ cross-wedge design in both the horizontal and the vertical plane, the clamp is locked firmly in every direction as it is tightened down.

With heavier and higher workpieces we recommend using the clamps with pull-down action (double-wedge, single wedge) to ensure that there is no upwards movement.