Resin drill is refers to the use of synthetic resin (by a class of synthetic polymer) as the raw material!

Through modeling of complex mode, heating to promoteresinHardening, made into a variety of different shapes, then at the bottom of the silver plating, make it reflects the light of positive seems to be a diamond at the bottom of the flash effect, if adding different additives, can change the different physical properties, such as increased hardness, and pervious to light diopter increases!