BRASS ALLOY CASTINGS WITH RUBBEER MOLDS WERE USED BY A FORMER DIAMOND SETTING SCHOOL TO TEACH DIAMOND SETTING SOLD WITH OR WITHOUT RUBBER MOLDS LARGE ASSORTMENT PERFECT FOR JEWELRY SCHOOL OF JEWELRY MANUFACTURER WHO NEEDS A LARGER VARIETY OF DESIGNS CHARLES STUART CONTACT EMAIL IS locschool@aol.com or Service @jeweleryhandpiecerepair.com