1Usage: Joint goniometer is a professional ruler that can be used to measure the range of motion of the knee, elbow, finger, and other joints, and the degree of spinal curvature. 2360 Degree: Goniometer provides 360 degrees coverage, adopted 1 degree increments design, which is suitable for a variety of objests with 360 degree rotation. 3Transparent Design: Finger goniometer adopts a transparent design, with clear and accurate scale, allowing you can clearly observe the measurement data of joints. 4Widely Use: Joint goniometer tool can be used to measure the range of joint motion, and spine Angle, also can be used in the production of architectural drawings and level measurement. 5Excellent Acrylic: Finger small joint goniometer is made of high quality acrylic material, firm and sturdy, wear resistant and durable, which can be used for a long time.