CURT 48641 - SECURELATCH LUNETTE RINGSECURELATCH LUNETTE RING & CHANNEL 40K CURT Drop in pin accepts lock to deter theft (turns 90 degrees while coupled) Flexible height adjustment for more drop or rise as needed Heavy duty 3 hole bolt pattern with 11 3 4" x 2 3 4" channel Rated for 40,000 lbs. gross trailer weight 3" inside diameter fits pintle hooks, ball & pintle combinations or clevis bars Cast iron construction is austempered for superior strength and wear resistance Textured, dark