Application Used to precisely measure the spoke tension step by step in the course of wheel building process. with top-class material for durable and practical use. Adjust the tension of the steel wire to correct the deformation of the wheel. Features - Color: Black. - Material: Metal - Size: 19.5x14.5x3cm - Application Used to precisely measure the spoke tension step by step in the course of wheel building process. - with top-class material for durable and practical use. - Adjust the tension of the steel wire to correct the deformation of the wheel. - Light weight and high performance. Portable for easy carrying. - A necessary tool for building, repairing, or truing wheels. - Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand