Large, medium and small size SK4D010 1. Adjustable opening width: The cotter can be adjusted according to the size of the patient's mouth to ensure patient comfort and safety during surgery. 2. 2. Stability: The dental cotter holds the patient's mouth firmly in place, allowing the surgeon to perform the procedure better and reducing the risk of surgery. 3. Durability: Dental openers are usually made of high-quality metal materials that are highly durable and can withstand prolonged use and sterilisation. 4. Safety: Openers are designed with patient safety in mind to avoid damage to oral tissues.