Adjustable wrist strap makes the placement of the band easier and more convenient, better fits the teeth, adapts to different tooth shapes. The stainless steel wristband can be grasped and fixed on the tooth , which makes broken teeth clean and dry. The tapered neck makes them easier to place and provides better visibility and reduces congestion. This is especially useful when cross-sections cannot be used (e.g., large gaps between teeth, missing adjacent teeth, amalgam restorations, etc.) Notice: do not reuse. Dental Matrix Band, 50pcs Momar Restoration Matrix-Profecto Sectional Matrix Ring System Adjust