To provide secure attachments of diamonds, files or stones, to dedicated guides, spring or beveler clamps are necessary. The spring clamp can be quickly squeezed and repositioned while the beveler clamp 
requires the tightening and loosening of the thumb screw. The beveler clamp fits in the hand nicely while the spring clamp may feel awkward and in the way until you get used it’s shape and you find a comfortable position.
Tip: By removing the plastic knob on the SVST beveler clamp screw to expose the hex (allen) screw top, a hex key or wrench can be used as a preferred method by some to more easily tighten and loosen the clamp.