Description: Professional and exquisite workmanship makes it very wear-resistant and durable. Simple and convenient operation steps will not waste your time and energy. The labor-saving and time-saving feature makes it very reliable and efficient. And the ergonomic design makes it very comfortable and non-slip to hold. Made of aluminum alloy material, it is very durable to use. The length of this product is 43cm and the width is 16.5cm. It is used for the calibration and correction of the tail hook on the bicycle. By locking and pressing the sliding bracket, the distance between the measuring rod and the hub can be adjusted, and the deviation between the tail hook and the rim can be measured. Item Name: Bicycle Tail Hook Corrector Material: Aluminum Alloy Features: Wear-resistant, Calibration, Labor-saving Size Details: Size: 43cm x 16.5cm/16.93" x 6.5" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bicycle Tail Hook Corrector