Curt MFG. Towing Trainler Posi - Lock Coupler. For secure connections while you travel, grab a Posi-Lock Coupler! Features a lockable latch for peace of mind on the road. Durable zinc finish to keep it lookin" good for years! Comes with manufacturer"s 3-year warranty. State Size. Buy yours now! Tongue Load (lbs.): 700; Gross Load (lbs.): 5,000; Description: 2" Ball, 3" Channel; Dimensions, Weight: 11 x 5 x 5", 5.2 lbs. Curt MFG. 5,000-lb. Towing Trailer Posi-Lock Coupler