2 for $20. The Strong Jaw is a chewable jaw exerciser that fits between the upper and lower incisors that gives an insane jaw workout! The Strong Jaw is made of 100% silicone and offers 50-60 lbs. of resistance.
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2 for $20. The Strong Jaw is a chewable jaw exerciser that fits between the upper and lower incisors that gives an insane jaw workout! The Strong Jaw is made of 100% silicone and offers 50-60 lbs. of resistance.