Trailer Coupler Lock Guards against trailer towaway theft.
Lock can be keyed alike so that the same key will work on multiple 378DAT locks. Simply select the keyed alike option above and then enter the number of locks needed.
Note: Cannot key the locks to match other styles of locks. Keyed alike option will only match other 378DAT locks.
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Average Customer Rating: 
4.7 out of 5 stars (13 Customer Reviews)
by: Bob02/01/2011
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This worked great for my Magiclloader boat trailer! The width of the flange area surrrounding the hitch-ball-socket on the trailer tongue is 4.5 inches. I tried other locks from West Marine and Lowes and they were too small/narrow. This lock resolved the problem and works great!6497
by: Jes05/20/2013
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Great fit on my dump trailer the large base works great for 2"5/1681017
by: Derek T.05/13/2013
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Lock works perfectly on a 2-5/16" trailer coupler (28' trailer). I previously tried the less expensive "universal" lock from the local retail store, but it didn't work because the cheaper yellow lock has a U shaped bar the goes over the coupler. Larger couplers are wider and the "universal" lock. This coupler lock locks from the side (no bar over the top). It fit by coupler perfectly snug. Appears to be robust as well. I would definitely recommend this lock to people that need to lock larger sized trailer couplers.80033
by: Dave L05/09/2013
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Works great installed and feel a lot safer now!79624
by: David03/27/2013
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It was received on time and the product works well.72971
by: John M.02/12/2013
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This is my third coupler lock. It is a replacement for one that was cut off. a relative borrowed my trailer, and stored it for the winter. In mid winter the storage place closed for good and he had to bring me back my trailer he couldn't get the lock open because it was frozen. It had rained and the temp dropped. So he decided to cut it off. I can tell you he worked hard and long to cut it and the Masterlock that was also locking the coupler. locks keep honest people honest. when he locked it in the fall if he would have wrapped the lock with plastic wrap he could have used the key and saved himself time and the cost of my locks........65868
by: James01/25/2013
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your product is great but i buyed the wrong type. mysmtake and i have no face book.thank you and i know where to buy my trailer gear now.64119
by: Doug A.10/19/2012
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Fits perfectly. Looks to be very good quality materials and finish. I like the idea that it allows my other padlock to still be used - two locks will slow down the thieves. My trailer sits out under a canopy and is exposed where the public can see it. This lock gives me much greater security.57693
by: Bruce Gustafson09/20/2012
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As described and very delivery and resp onse.55258
by: J M07/16/2012
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Be EXTREMELY careful with this lock. It is very easy to pull the key assembly out of its housing and lose locking mechanism pieces. This lock certainly kept my boat from leaving my driveway. By anyone. Including me. (It also takes about 5 minutes with a cutting wheel to remove, so make sure you're never out of ear-shot of this thing.)48055
by: DAVID L.08/15/2011
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THE TRAILER HITCH LOCK WAS VERY WELL BUILT. IT FIT GREAT. WAS DELIVERED IN A TIMELY MANNER. IT WAS PACKAGED VERY WELL FOR SHIPMENT. CUSTOMER SERVICE AND FOLLOW- UP WAS GREAT. PRODUCT WAS REASONABLY PRICED.'21930
by: Ted Manson03/15/2011
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excellent product! it will be almost impossible for anyone to cut this lock. Very fast shipment, awesome company to do business with. 9361
by: ron s03/21/2011
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I put it on and it fit's 9932
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