Features1Accurate Adjustment: This tool can make fine adjustments to the left and right hand manual derailleur, ensuring quick and accurate gear position adjustment and a smooth shifting experience every time 2Aluminum Alloy: This derailleur hanger alignment gauge is made of aluminum alloy, which has high strength, light weight, wear resisting, and erosion resisting. Its durability ensures long lasting performance 3Professional or Individual Use: This versatile adjustment tool is suitable for professional cycling repair shops and individual cyclists, providing an efficient solution for maintaining high cycling performance 4Compatibility: This alignment gauge is suitable for road cycling, and is compatible with various derailleur system, meeting the specific needs of riders seeking accurate adjustment of high performance cycling 5Versatile Application: Whether you are preparing for a race or just enjoying a leisurely ride, this derailleur hanger adjustment tool can smoothly shift your gears, making it an essential tool for any road cyclistSpecificationItem Type: Derailleur Hanger Alignment GaugeMaterial: Aluminum AlloyPackage List1 x Alignment Gauge4 x Accessories