Features 1.FLEXIBLE AND ROTATABLE: The angular leg of the protractor angle detector can be rotated around the scale 2.DURABLE MATERIAL: The medical spinal goniometer is made of excellent plastic material and is tough and strong 3.EASY TO OBSERVE: The medical goniometer uses a transparent color design to clearly see the axes and range of motion of joint 4.LIMB AND JOINT MEASUREMENT: Place the medical angle ruler directly on the limb or joint for observation, measured in inches and centimeters, located on the arm of the height gauge for easy reading 5.FUNCTION AND ROLE: The medical goniometer helps determine the range of motion of the joint and measures the progress of recovery after injury to measure this range of motion and identify improvement Specification Item Type: Medical Spinal Goniometer Product Material: Plastic Use: Multifunctional ruler Package List 1 x Orthopedic Ruler 1 x Finger Ruler 1 x Corner Ruler 3 x Limb Ruler