Feature: 1. Clear Number: Protractor angle ruler can observe the motion axle and range of joints, and can be placed directly on joints or limbs for easy observation. 2. Rehabilitation Equipment: Transparent spinal goniometer tool is able to rotate, which can be used more flexibly, and is very good for your body health. 3. Wide Application Range: Orthopedic angle ruler can be used to measure the range of joint motion, spine angle, etc. It can also be used for making architectural drawings and level measurement. 4. Transparent Color: Professional spinal goniometer tool is designed with transparent color, which is able to clearly observe the range of motion of joints. 5. Plastic Material: Goniometer is made of plastic material, which is tough, durable and has a long service life, and is able to be used for a period of time. Specification: Item Type: Protractor angle ruler Material: Plastic Usage: Protractor angle ruler is suitable for measuring the range of motion of finger joints and the degree of spinal curvature.. Package List: 1 x Protractor Angle Ruler