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Protect your trailer from theft with this swivel-head coupler lock. Chrome-plated steel resists rust.
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be talking a look at the Bulldog easy access rotating or swivel head trailer coupler lock. Part number on it is BD580409. The lock comes with two keys. Has a plastic housing around it to protect the lock as well as a sliding dust cover to prevent anything from getting into that tumbler and causing corrosion. Got a step pin, going to slide in. Locks very easily.
The lock also rotates 360 degrees to give us access to that tumbler at any angle. It's got a chrome-plated steel. It's going to help to resist corrosion. It couldn't be easier to use. Take it, indentions here in the end, easy to hold onto.
Slide it through and push it closed. That's going to prevent anyone from hooking up to your trailer and being able to secure it to their vehicle or also anybody removing it from your vehicle and talking it. They do offer a limited lifetime warranty on the lock so you can be sure that they're going to stand behind their product. That will complete today's look at the Bulldog easy access coupler lock with the swivel head, part number BD580409. .
Fantastic product, bought 2, one for each trailer.
Bull Dog brand so you can't go wrong - a step above just a pin - BD580410 might be better adjustment wise against my Bull Dog coupler. Also use a coupler lock like Master ML389DAT.
Fits good on my trailer. I should of brought a lock with the shaft a little smaller. ( that is my fault !) the lock is well designed and will keep your part crooks at bay. Your serious crooks will use a large bolt cutter and cut it. This is true with any lock. I do feel better having my trailer locked up now with this lock.
Super fast shipping. This going to work exactly what I need it for.
Exactly what I needed to secure my boat trailer on the hitch. My trailer has surge brakes and the wider hitch design made it too long for local available lock systems to engage. The Bulldog lock offered the length needed, plus the excellent description and videos offered by etrailer made my choosing the right product for me a snap, along with the great pricing, and prompt processing service makes etrailer my first stop for all my trailer needs in the future.
Works great for the collar lock trailers
The Bulldog coupler lock looks to be of fine quality. I will still need to have some holes drilled in my trailer tongue in order to use it as intended, but it should secure everything nicely. Courtney B is exactly who anyone would want to take care of them. She seems knowledgeable and responds instantly. All in all, etrailer has given me the best online buying experience ever, twice!
Lloyd 
8/21/2021
Perfectly
Appears to be well built. The issue I have with the tongue lock is the lock mechanisim doesn't slide past the end of the pin. My last lock slid down the pin to make a tight fit and would be difficult to cut. This particular lock would be easy to take a bolt cutter to. As a pin to keep the latch in place it's OK but as a theft deterrent not so much. If theft deterring is your goal, I would look on past this item for something more effective.
Not the strongest lock but something to at least slow down a casual opportunity for theft at the weakest link in the chain of security.
Vernon J.
8/27/2022
Easy to put on and earned out well with the Jack-It bike Cartier we bought at the same time. Will need to have a plate made with cutouts to fill the gap but I did manage to make a short term fix using washers as additional vertical support.
Put that lock on my boat trailer and it finally quit moving everytime I was out of town!
Thanks Etrailer Love it!
Secures trailer at a reasonable price. Works as described and easy to operate.
Ken S.
3/15/2023
Great
Arrived quickly as ordered! Works great on my Demco 2-5/16" ball coupler.
After 1 season, the lock froze up and would not allow you to turn the key. After numerous attempts with lock luberencent, we ended up cutting the lock off.
Best way to protect your hitch from theft and much easier to use than other hitch locks.
Terrible product. After only a few weeks in use, the internal metal lock mechanism came completely out of the plastic outer housing and rendered the thing completely useless.
had a little trouble getting the fixed brake pad into position. No instructions were included and found out that the moving portion of the caliper had to be pushed sideways for the pad to fit into the correct groove. Other than that, things went as expected and you can't beat the service or the price.
The receiver lock fits perfectly and is EXACTLY what I needed. Once again etrailer exceeded my expectations!
Due to a recent rash of trailer thefts in my area I was looking for a way to lock my trailer latch, and this lock works great.
Just what I needed for the security of my trailer with the fastest of shipping! Thank you etrailer.com!
This was the only type lock that would work on my trailer. I received it quickly and it works perfectly. I especially like the fact that the key receiver is protected from the elements which should ultimately extend the life of the lock .
Brian
9/5/2020
The lock is still working flawlessly
Excellent lock for my application!
Lock works great and easy to pull out of receiver with the big handle on one end.
I have had the Bulldog trailer coupler lock for a year. Still locks and unlocks smoothly. It hasn't rusted at all. Great product.
Michael M.
8/5/2019
I have owned the Bulldog trailer coupler lock for over two years. It doesnt have one spot of rust on it. It still turns easily. Great product.
Product exactly as described. Great price. Arrived VERY fast. Will order from them again in the future.
Gina
8/18/2020
After a year of the owning this I am still very happy with it and etrailer.com. Will definitely order from them again!
They offer great products and amazing customer service
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Ed B.
8/31/2020
Great! Other locks bent this one has not bent pulling over fairly steep mountains.