SE JT-BS18 19-Piece Bezel/Prong Closing Punch Set (1) Hardwood punch holding handle (18) Punches with sizes ranging between 0.75mm - 7.75mm Prongs fit 2mm to 8mm Dimensions of storage box with metal clasp for secure closure: 5- x 2- x 2-" Used for closing round bezels around stones or prongs