The document discusses dental matrices used for composite fillings. It describes several matrix systems including Walser matrices, which use flexible bands that conform to teeth. The Walser system includes precontoured matrix formers in tidy packages for different tooth shapes. FenderMate is also described as offering a fast and safe means for establishing small to medium Class II composite fillings. It reaches from the base of a wedge to just above the occlusal surface and comes in regular and narrow sizes for left and right teeth.