CURT SecureLatch Flush-Mount Lunette Ring, 60,000 lbs, 2-1/2-Inch ID Model 48661CURT SecureLatch Flush Mount Lunette Ring, 60,000 lbs, 2 1 2 Inch ID Model 48661 The CURT SecureLatch flush mount lunette ring offers enhanced security and maximum versatility. Its integrated locking pin helps prevent coupling and theft when your trailer is left unattended, featuring holes in the bottom to accept a padlock. The pin can also be turned 90 degrees to allow you to hitch up your trailer. This lunette ring also offers increased height