The highly-functional Jaw Grading Bite Blocks promote symmetrical jaw strength, jaw stability, and work on jaw grading through varying jaw heights. The kit can also be used to teach jaw position and muscle memory for standard speech sound production. Excellent for use with apraxic / dyspraxic clients. Includes two sets of six reusable, durable and easily cleaned Bite Blocks and instructions for use. Made from FDA-approved material .Instructions sheet Included.