Material: This mountain bike spoke ruler uses as the material, which is durable, sturdy and not easy to break Portable: The length gauge ruler is small in size and lightweight which you can put in your bag when you are cycling Easy to use: The ball bearing measuring tool is designed with double side scale so that can measure more Wide application: The measure tool can not only measure bike parts, but can be also used as a professional tool for metalworking, woodworking, or engineering Fit occasions: This bike repairing accessory can be used in household repair and professional maintenance repairing