Home High Security and Challenge Locks (1037) Master 377 Trailer Hitch Lock (JUNK!)

(1037) Master 377 Trailer Hitch Lock (JUNK!)


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My vises are made by Panavise, a U.S. Company.  The one with the wide jaws is the model 350.  The smaller one is the model 301. Both have the 312 Base mount – www.panavise.com



  1. I’ve been looking for security for my new trailer. Wheel lock looks like it will be a Pewag 12mm chain (thanks Wayne Winton) and lock TBD, maybe the Stanley 828160 or Viro Euromonolith. Coupler locks are narrowed down to Proven Industries (they sell with Paclock 400A puck lock), or AMPlock which uses an Abloy lock (!). Receiver lock might be Deadbolt RH3SS (CT Johnson), Infinite Rule 61006, or AMPlock (Abloy lock). Any thoughts on these? The quality of locks vs picking is one thing. Failing due to a crowbar or pipe is another.

  2. Wow, they build, such a great outter lock, yet wont put an extra $1.00 dollar into security pins . . . …….SMFH

  3. I know better than to buy Master ANYTHING! There is a company that makes a device that clamps onto the hitch, and YOU supply your own lock, like an Abloy, Assa, Medeco, MulT, American, etc. padlock.

  4. Hmm, I think I saw you at 4min 49sec in the reflection in the trailer lock Bill. You’ve been exposed by a Master lock.

  5. Have you ever seen the Bowley lock? It seems virtually impossible to pick from the design as you can’t access the pins. Definitely one I’d look into myself to secure a building as it’s significantly cheaper than many other high security locks.

  6. On the Proven Lock website a guy takes that lock off in no time with a crowbar. Their system seems formidable enclosing the hitch and using their puck lock. I wonder what you think of their lock?

  7. I bought a trailer hitch lock that has a tubular key / lock on it. It's the best reviewed one i could find for a moderate price.

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