Amazon.com: Proven Industries Model 2517-B Trailer Lock, Fits Specific 2 5/16-Inch Bulldog Trailer Couplers with a Trigger Latch, Made in The USA, (Blue) : Automotive
Blaylock Industries TL-23 Complete Encasement Coupler Lock - For 2-5/16 Inch Bulldog Style Couplers | Hanna Trailer Supply