I made a set of hooks out of 1/8" by 1" steel. Bent the ends up past 90 degrees, drilled two holes in each and dipped the business end in liquid rubber. They are long enough to extend the reach of the jaws to about 16". they work great for gripping platters and odd shaped pieces. The original idea was to use two bolts in each one but have found one bolt is sufficient.
I would post a picture if I knew how.