Includes: 50 Uni-Grip 360 Universal Sensor Holders 50 Rinn Universal Digital Sensor Covers For use with 550100 Uni-GripAR Positioning Arm & Ring Uni-Grip 360 for Faster FMX!The Rinn Uni-Grip holder is designed to produce an entire full mouth series using only one holder. Sliding the bitepiece along the channels enables you to take anterior, posterior and bitewing x-rays. One per procedure is all you need. 84% of users found Uni-Grip 360 to be faster.* More positioning range - 70% more posterior, 25% more anterior.* Less Risk of Cord Pull - use with relaxed fit bags. Works with any Size 1 and Size 2 Sensors. Easy rotating bitetab to quickly change indications. Perforated adhesive tabs for fast, easy removal. Compact design means less bulk for smaller mouths. Use with Uni-GripAR positioning Arm & Ring for stress-free paralleling.