VEVOR Trailer Lock, Fits 2 & 2-5/16-Inch Bulldog Trailer Couplers, Heavy Duty Hitch Lock with 3 Keys Secures Security Chains, Corrision-resistant, Anti-Theft RV Trailer Locks for RV, Trailer, BoatSecure Your Trailer from TheftCompatible with Bulldog CouplersReinforced Steel Lock BodyDurable & Corrosion-resistantWide ApplicationEasy InstallationCompatible Coupler Type: Bulldog Coupler,Compatible Coupler Sizes: 2 in / 50.6 mm; 2-5/16 in / 58.6 mm,Item Model Number: THS001,Product Weight: 11.9 lbs / 5.4 kg,Style: Nesting,Wall Thickness: 0.24 in / 6 mm,Product Dimensions: Φ4.53 x 8.86 in / Φ115 x 225 mm,Internal Depth: 7.09 in / 180 mm,Internal Diameter: 4.02 in / 102 mm,Main Material: Carbon Steel + Surface Coating