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provenlocks.com/
Proven Industries only manufactures products out of the strongest materials. In order to have the best coupler lock you have to start from the ground up, this has been our motto from the beginning and has set us apart from our competitors. We manufacture coupler lock model 2178 out of ¼ steel and most competitors only use cheap casted materials to keep production cost low. This was no oversight when Proven Industries was constructing the best trailer coupler lock on the market.