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Lock secures most latch-style trailer couplers. Rubber-encased pin tumbler cylinder adjusts incrementally - from 9/16" to 2-3/4" - along notched, 1/4" diameter stainless steel shank.
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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 taking a look at Bulldog Adjustable Coupler Lock part number, BD580410. This coupler lock offers us six different positions when it comes to locking our coupler in place. The first one allows us about 2-7/8" worth of room. Each click is a different position, all the way down to about 3/4". It has a covered lock tumbler, prevents the dirt, rust and dust from getting in there and we've got two keys that have a nice coated finish to them. The lock itself also has a coating around it. You've got a silver side and then just a circle.
The silver side is the one you want facing your coupler lock as you put it in. Just going to slide it in and adjust it to the narrowest position. Being able to lock it in so many ways really eliminates the ability to get a large enough tool in there to do any damage and our rotating lock face is going to help to resist that prying. Once we get our coupler locked up that's really all there is to it. We can know we can either store our trailer safely or leave it hooked to the truck without it disappearing. That will complete today's look at the Bulldog Adjustable Coupler Lock, part number BD580410.
Average Customer Rating: 4.5 out of 5 stars (30 Customer Reviews)
Lock secures most latch-style trailer couplers. Rubber-encased pin tumbler cylinder adjusts incrementally - from 9/16" to 2-3/4" - along notched, 1/4" diameter stainless steel shank.
It's not bad it's an inexpensive way to keep the honest honest and keep your lock lubricated they work well
The first time I used this it seemed like it would be a good adjunct lock or quick lock if I was going to be away from the trailer for a bit. Unfortunately that didn’t work out. I locked it no problem. When I went to unlock it later, I inserted the key and turned. It felt stuck, I jiggled it a bit and turned again with two fingers. It seemed like it was turning easily but then the key snapped of leaving most of the key in the lock and unable to be removed rendering it useless. Fortunately the lock shaft is only marginally stronger than the key. I was able to easily cut through it with a hacksaw blade that I removed from the handle, bypassing the locks chief security feature, in just under 2 minutes.
The lock is well made and works as described. I gave it 3 stars vs 5 due to the lock not closing tight on the latch because the locks circumference is wide enough to hit the coupler. This leaves plenty of room for a bolt cutter to get a grip.
Works well with the Bull heavy duty coupler. The width locking is adjustable so it pulls up tight to the over width of the Bull Coupler.
I bought this thinking that this would be more of an obstacle than others because you squeeze it up to the tongue latch so that there is no way to get a hacksaw in the gap. Unfortunately the manufacturer's 6 tongue latch widths don't match mine. I'm on the last narrowist width but not quite, so I have to go to the next narrowist which leaves a decent gap for sawing it off. I push it together so that it looks flush (no gap) but it eventually wiggles open to the actual lock position. I've squeezed the latch as much as I dare for good operation and I'm so close - - but no cigar. Oh well, wished they had put more notch positions. The unused length looks easy to cut off so that you don't stick your leg with it.
adjustable coupler lock for Bulldog hitch tounge :
prevents collar from sliding back, preventing take trailer off ball; or, putting on a ball. Simple solution.
etrailer.com provided excellent service and value.
Lock shaft diameter smaller than I anticipated.
Item does have a sliding cover over lock face to keep moisture and debris out.
Used for hitch lock on Kwik Load car trailer.
I've got a trailer coupler on my trailer that no other lock type will fit on. This is working fine right out of the box. Question will be how long it takes to rust. If its made right, it might not.
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.
E trailer is awesome. The products are great and reasonably priced. Great customer service and fast shipping!!
Product as described. Should be a big help in securing our travel trailer.
Adjust perfectly to my latch handle.
Product was complete and works great. Thank you.
Michael H.
6/4/2017
Working great for our application. Zero problems.
Bull dog make good stuff
great product leave it on all year around . spray it twice a year with wd-40 opens and closes every time
Works perfect and gives me piece of mind every time I use it
Great experience here. Product was just as described and arrived in a timely manner. Very satisfied!
Pretty decent. Would probably buy again, but the build is a light feeling.
easy to use, solid, and peace of mind while using.
Good price. Good service. Thanks.
Easy process to order and fast turn around time to receive the product.
Went right on just as expected.
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Dean
6/1/2020
The Bull coupler lock is still working well and I havent found a better lock.