【Wide Use】N163 Series frame keys for Thule Ski,Roof,Cargo Box,Carrier Racks and Crossbars 【Product Material】 Replacement Key for Roof Racks is made of metal material with a silver finish. 【Product size】The dimensions of roof rack keys are: 0.98 x 1.88 inch. Manual measurements, please allow slight errors. 【Note】 rack replacement keys are specially designed keys that can replace lost or damaged keys for Thule roof racks, bike racks, and ski racks. 【Opinion】If you have purchased this product from us and find a mismatch after using it, you can always return it. If you have any questions or suggestions, please feel free to contact us and we will respond within 24 hours. Thule rack replacement keys are specially designed keys that can replace lost or damaged keys for Thule roof racks, bike racks, and ski racks.