Easy Mount Gem Set Pliers feature: 10 to 1 Lever Ratio: better control of pressure and jaw travel. Adjustable Jaws: Fast adjustment to any size setting is a plus! Parallel Closing Jaws: eliminate the "push out" effect of conventional pliers. Limited Travel Stop: they close only as much as necessary to bend the prongs. You can set the most delicate stone with less fear of breakage.