Features Durable High-Quality Material: Made of high-quality plastic, these medical rulers are lightweight and durable, ensuring long-lasting use in medical environments. Rotatable Straight Ruler: The rotatable straight ruler features a center line through the angle plate, making it easy to measure and read angles with precision and accuracy. Convenient Semitransparent Design: The semitransparent design enhances convenience in reading angles, allowing for clear visibility and accurate measurements. Range of Motion Measurement: Specifically designed to measure the range of motion in joints, making it an essential tool for medical professionals. Specialty Medical Measurement: Specially designed for medical applications, this 360 degree protractor angle ruler is ideal for medical spinal goniometry and joint measurement. Professional Medical Measurement Tool Experience accurate joint motion measurement with the yunyi 3Pcs 6/8/10inch 360 Degree Protractor Angle Medical Ruler. Crafted from high-quality plastic, this durable and lightweight ruler ensures precise angle measurement, with a convenient semitransparent design for easy reading. Ideal for medical professionals seeking accurate joint motion assessments. Package List