Bulldog, Heavy Duty, Cast A Frame Tongue Mount Coupler, Fits 2" Ball, 6" Length, High Strength Steel For 50 Degree Trailer Tongue, Designed For Utility, Horse/Livestock, Cargo & Construction Trailers, Easy To Use, Strong In Both Static & Dynamic Loading Conditions, Hinged Ball Socket For Easy Hook Up & Clear Visual Indication Of Proper Closure, SAE Class III.