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Model GB1 is our most popular gooseneck trailer coupler lock because it fits the most common BullDog gooseneck trailers. Please make sure to select the round or square type drop tube. We also recommend measuring the bottom of your gooseneck trailer. There is a 8'' and 7'' version of this style BullDog coupler.
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. In addition, no other trailer coupler locks can secure your safety chains.
Gooseneck Trailer coupler lock model GB1 may not fit all trailer couplers. Please look at trailer coupler lock index pictures below, if you do not see your trailer coupler picture please fill out the contact form to ensure you will get the correct trailer coupler lock. This lock will not fit the BullDog BX1 series couplers.