1. Find Your Most Comfortable Cycling Posture: Our knee joint gauge helps adjust bicycle components to achieve optimal body-bike alignment, enhancing comfort, efficiency, and performance while reducing the risk of injury. 2. Retractable Design for Easy Storage: This bike joint protractor features a compact, extendable design for convenient storage when not in use, making it a practical tool for cyclists. 3. Rotate Along the Arrows: Follow the directional arrows to accurately use this cycling arm and leg angle finder, ensuring precise measurements for improved cycling posture and comfort. 4. Hanging Hole Storage Design: Equipped with a hanging hole, this protractor can be easily stored on hooks or pegs, helping keep your workspace organized. 5. High-Quality Materials: Made from durable plastic, this bike fitting posture angle measurement tool offers long-lasting performance and reliability. Color: Blue Material: Plastic Package Contents: 1 x Knee Joint Angle Measuring Tool Note: Only the items listed above are included. Light reflection and different displays may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.