Bulldog trailer couplers are the standard by which all others are measured. No other competitor offers the combination of Heavy-Duty materials unique features and replaceable parts for outstanding performance and long life. That’s why Bulldog is the right selection for your Heavy-Duty towing needs whether its utility hauling horses and livestock cargo or construction trailer applications. Bulldog A-frame couplers are a Heavy-Duty design often specified in commercial farming and ranching applications. Available in both a Heavy-Duty wedge latch style and a Heavy-Duty Collar Lok style both are rugged and durable designs that will provide years of service. Collar Lok A-frame couplers are available in a range of capacities from 5000 to 15000 Pounds Gross Trailer Weight. The Collar Lok feature offers a patented industry exclusive continuous tensioning for an “Always-Perfect” fit and worry free operation. Constructed of high strength steel for 50 Degree trailer tongue. Trailer Coupler Adjustable Lock Nut For Proper Ball Tension Locking Hole In Coupler Handle Positive Locking Trigger Constructed Of High Strength Steel For 50 Degree Trailer Tongue Available In A Range Of Capacities From 5000 To 15000 Pounds Gross Trailer Weight. Hinged Ball Socket For Easy Hook Up