Bulldog Heavy Duty COLLAR-LOK Coupler.2-5/16 ball high-profile coupler fits 50 degree “A” frame trailer tongue.Designed for utility, horse/livestock & construction.12,500 lbBulldog heavy duty couplers are designed for utility, horse/livestock, cargo and construction applications.Bulldog Collar-Lok is the strongest in the industry. The Bulldog design features the only automatic and continuously tight ball fit in the industry.








