1.Find Your Most Comfortable Cycling Posture: Our knee joint gauge aids in adjusting bicycle components to achieve optimal body-bike alignment, boosting comfort, efficiency, and performance while reducing injury risk. 2.Retractable Design for Easy Storage: This bike joint protractor features a compact, extendable design allowing for convenient storage when not in use, making it an essential tool for any . 3.Rotate Along the : Simply follow the directional arrows to accurately use this cycling arm leg angle finder, ensuring precise measurements for improved cycling posture and comfort. 4.Hanging Hole Storage Design: Equipped with a practical hanging hole, you can easily store your bicycle joint protractor on hooks or pegs, keeping your space organized and clutter-free. 5.High-Quality Materials: Constructed from premium materials, this bike fitting posture angle measurement tool promises long-lasting durability and reliable performance for all your cycling needs. Color: blue Material: Plastic Package Contents: 1 x Airship Knee Joint Angle Measuring Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.