Lunette ring and pintle hook to tow - Overland Trailer Ep4 - YouTube
2.5" inch ID Steel Pintle Ring - Bluestreak Equipment
Amazon.com: BulletProof Hitches Pintle Loop Lunette Ring Rated to 24,000lbs. for Towing Pintle Military Trailers, Demolition, Recovery (Solid Steel, Black Textured Powder Coat) : Automotive
CURT 48205 Pintle Hook Hitch 10,000 lbs, Fits 2-1/2 to 3-Inch Lunette Ring, Mount Required - Walmart.com