All-in-one matrix system with innovative integrated tightening/opening system. The ideal solution for Class II MO/OD/MOD composite fillings in posterior areas. Integrated clamping system for easy and stable tightening. Integrated release mechanism for fast and simple removal. Ring matrix band for stable placement without distortion through tight intact contact points. The matrices are made of non-dead-soft 0.038mm medical grade stainless steel, which allows super matrix stability. Various sizes allow you to work on premolars and molars, from 20mm to a 42mm diameter, with good perimetral adaptation of the matrix to the tooth.