Clamping devices for use with machine tools, namely, clamps for use in the precision clamping of workpieces with various shapes and sizes and for clamping multiple workpieces together on a common frame to enable the clamped workpieces to be worked upon by the machine tools and clamps that are adjustable to enable use in the precision clamping of workpieces with various shapes and sizes and for clamping multiple workpieces together on a common frame to enable the clamped workpieces to be worke...