Keeper O-Track Double Stud Fittings Have A Working Load Limit Of 2,000 Lbs. And A Break Strength Of 6,000 Lbs. They Allow For Convenient Tie-Off Locations. They Work With Beveled Or Standard O-Tracks, With A Variety Of Hooks Including S, Snap & Double J. They Are Easy To Install And Remove From Track. Increased Strength For Heavier Loads.