Includes: Molt Mouth Gag with Silicone Tips & Ratchet Locking Mechanism - Premium. Sizes: 3.5 inches (8.89cm) Child Size Mouth Gag | 4.5 inches (11.43cm) Adult Size Mouth Gag | 5.5 inches (13.97cm) Adult Size Mouth Gag. Material: Crafted from German stainless steel, which is known for its high corrosion resistance and can be sterilized. The silicone tips are silicone inserted for comfort and to prevent the gag/prop from damaging the teeth or gums. Ratchet Locking: This type of mechanism allows for the gag to be securely fastened in place and adjusted to the desired level of restraint. The ratchet mechanism typically uses teeth that interlock to prevent the gag from coming loose. The Molt mouth gag is a dental instrument used to prop the patient's mouth open during dental and ortho procedures.