Compatibility: s hook keeper rubber for rv, trailer, boat and other trailer hitch applications. 3.26 inches long, fits 3/8 inch hooks, pack of 4, black. Use And Function: secures the hitch, prevents slipping, reduces wear and damage, and improves safety. Premium Quality Material: hook keepers are made of high quality rubber with excellent abrasion resistance and flexibility. Easy To Install And Use: simply slide the rubber keeper onto the s-hook to lock the safety cable and hook securely in place, preventing it from falling off during transport. Thank you for choosing us! Your satisfaction is our top priority. If you have any questions or need assistance, please don't hesitate to reach out. We are committed to providing fast and professional support to ensure you have the best shopping experience possible. s hook keeper rubber, Protective Cover for 3/8’ S Hook Traction Safety Cable Retainer, Ensure your traction safety cable is securely in place with this durable S Hook Retainer Rubber Protective Cover, made of high-quality rubber material that provides a strong and reliable grip, preventing the safety cable from falling off of the hook while travelling.