Features: Two functions in one tool. Function 1 as a derailleur hanger alignment hauge, function 2 as a road bike double control lever alignment tool. Make from Aluminum alloys and stainless steels, very light weight and Enduring. This road bike double control lever tool can quickly adjust the left and right double control levers to make them symmetrical and at the same height. You can use it to adjust most road bike double control levers. Suitable for both bike repire shops and individuals. It is a tool for modifying and adjusting road bicycles wheel transmission Shifts. Specifications: Materials: Aluminum alloys and stainless steels Size: about 39.5x15.50cm/15.55x6.10inch Package Includes: 1pc Bike Double Control Lever Alignment Tool note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.