Baseline 12-1014 Black Plastic Finger Goniometer, 1-Finger Design Baseline plastic finger goniometer Can be used with only one hand to measure your patient Using your finger, move the measurement head through flexion, extension and hyper-extension Measures 110 degree flexion through 40 degrees hyper-extension in 5" increments This goniometer is also known as the one-hand goniometer because readings can be taken by the therapist using only hand