Sensible Adjustible Bite Blocks LgAccurately positions radiographic media Able to hold most sensors available in the market Fully adjustable holder Facilitates taking super accurate X rays Two Tone bite block refills for the Universal Sensor Holder,a system designed to reposition or fix sensors in posterior, bite wing, and anterior positions with a simple push of a button. The holder ensures a very precise capturing of X rays with its alignment arms and aiming rings.