About this item Chisel your Jawline – This Jaw exerciser will help you define your Jaw and tone your Face with a quick Jaw workout. Protects your Teeth by using Premolars & Molars – Our Jawline Exerciser puts pressure on your back teeth, which are meant for crushing. Other devices put pressure on your front teeth which are only meant for cutting. This can give you damaged crooked teeth. Enhance your Jaw Muscles – By using our Jawline Shaper, you will increase the size of your Masseter Jaw Muscle giving you a sharper and more attractive look. Workout, Slim and Tone your Face & Neck with the Jaw Chiseler without any aggressive or chemical treatment. Made of 100% Food Grade Silicone – No peculiar smell, taste and completely safe to use for Men and Women.