With the Invincible Marine BR59404 Trailer Receiver, 5/8-Inch Lock Pin Type be sure your trailer is protected with high-quality, maintenance-free security. Simple yet effective, this locks your receiver to your trailer hitch and comes with a coupler pin. Rock solid construction and heat-treated for toughness, this one-piece will not rust, corrode or clog. This trailer receiver includes two keys; keep one key in your safe-box, and the other on your keychain, and know your hitch is safe and accessible at all times. Whether you're outfitting your boat for the first time, or replacing well-worn nautical parts, this product is an essential accessory for your boating and domestic needs, and is perfect for nautical journeys and mechanical maintenance. Precision and reliability are the marks of quality that this product has proven time and time again, guaranteeing steadfast performance with each use. The Invincible Marine BR59404 Trailer Receiver comes with a 1-year limited warranty and protects against manufacturing and workmanship defects. Rugged, tough and reliable, Invincible Marine is well-known for their hardworking nautical line. For freshwater and saltwater boating, Invincible Marine designs products for avid fishermen and weekend boaters. Quality, utility and innovation go into every Invincible Marine product giving you more time on the water.