UNIVERSAL FIT. Ratchet is designed adjustable with 11 locking positions and fits 1-7/8”, 2”, and 2-5/16"couplers. Please refer to the "Dimensions Page" for specific dimensions COLOURFUL. The use of a bright, deterrent yellow color provide durable, highly visible protection for trailers SECURITY. To protect your trailer from theft, this lock is made with an aluminum body and high-strength steel construction, strong cut, and shear resistance. Special note, the U-bolt and the insert hole of this lock have been modified to prevent theft, and the size of the insert hole has been reduced. For easy removal, please lock and unlock at a vertical 90° Enhanced Lock Cylinder. To make the tow ball coupler lock more robust, we upgrade more complex locks and thicker keys. This makes it impossible to crack the lock and increases the toughness of the key 100% return for quality issues. 120 days warranty. If you encounter any problems, please feel free to contact us. We are always happy to help and are committed to providing a responsive solution 24/7.