Safely set stones with minimum effort and maximum control, Gemsetting pliers close with a parallel motion so even pressure is applied when closing prongs and thus reduces the chance of damage to the stone. Jaws are easily adjusted by turning the opening adjustment wheel. 10:1 lever ratio allows precise movement predetermined distance set by the jeweler. Works well with prongs and settings of all sizes and shapes. Easy to control and grip with the lever-action handle and limited travel distance. Simple adjust to fit the prong. Than gently squeeze to bend the prongs.