FITS 2” BullDog Trailer Couplers (Puck Lock Included)

Model 2178-B was designed to fit 2” BullDog style trailer couplers. This style trailer coupler is usually found on heavy duty trailers such as those used in commercial applications and heavier weight-rated trailer applications. In most cases, Bulldog style trailer couplers will be found on commercial trailers, but in some cases trailer manufacturers offer Bulldog couplers on non-commercial trailers as an upgrade.

Designing the best coupler locks is not an easy task. We pride ourselves on producing a “glove like” fit coupler lock. Rest assured that Proven Industries trailer lock products will leave you with simply the best coupler lock on the market.