This cam action fixture clamp provides positive down force while using very
little space on a fixture. Workpieces can be clamped in series by using the
back surface of a clamp to locate the next workpiece.
The hardened steel clamping element has both a smooth surface for machined
workpieces and a serrated clamping surface for rougher work. The
height of the clamp can be adjusted by milling the slot deeper
in the fixture plate.