a universal joint apparatus comprises clamps , a locking mechanism , and a rod connecting the clamps and the locking mechanism . at least one clamp is a scissors clamp , i . e . a clamp comprising two segments fastened by a pivot . the scissors clamp generates extra compressive force on the object being held , providing a stable and rigid universal joint . clamps are able to rotate with respect to each other , allowing for greater flexibility in usage . the universal joint apparatus is capable of being added to a support frame between other components