Master Lock Key Alike Lock Set #3774DAT
Normal Price:$62.96
Our Price:$39.99
Availability:Usually ships in 24 hours
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Manufacturer: Master Lock
Model: 3774DAT
Binding: Tools & Hardware
Publisher: Master Lock
Label: Master Lock
Features for Master Lock Key Alike Lock Set #3774DAT:
- 3-piece lock set for trailer-hitch security
- Includes coupler lock, coupler latch lock, and receiver lock
- Fits 1-7/8- and 2-inch balls, 2-inch Class III / IV tubes, and most standard latches
- One key opens all 3 locks for convenience
- Includes Cordura storage pack
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Customer Reviews
trailer lock kit 
2008-02-10
Great product. It is really nice and convenient to have all three locks use the same key. Also, it is very convenient to have all three locks stored in one case, which can save you time looking for your different locks.
Master Lock Key alike set 
2008-02-05
Great product! It looks sharp and strong. I will buy another for my other trailer and vehicle. Thanks for making a great product at a great price.
Nice Lock Set 
2007-11-24
This lock set is as advertised. Simple, keyed alike locks which are relatively easy to install. Only issue is the ball on the coupler lock can be a bit stuborn to remove, but it could just be my trailer. I've only had the locks for a month or so, no rust yet. I live in Florida so mine will get regular use and I doubt will get a chance to freeze up.
Works Great! 
2007-08-19
I guess the only way I will know for sure that the locks are bad is if the trailer is stolen (which hasn't happended yet), but that said, all the locks work great. There is a big advantage to 1 key for all the locks.
A minor point, but the hitch bar to hitch receiver lock barely fit my particular hitch bar and hitch receiver, it did take a little fiddling. This isn't the fault of the lock, but just a warning that you may need to try the lock on either side of the receiver to get the lock to actually lock.
Convenient and only one key! 
2007-07-29
I used this set on my travel trailer the last two weeks and it was great. Especially to only have to worry about one key. The receiver lock is solid and comes with a nice rubber cover for the key hole. The hitch lock is a bit of overkill, but no one's rolling away with my trailer when it's on :) I defintely would recomend this set over others even thoug the pin lock is a little bit tough to get onto a bigger trailer hitches.
Latch Lock is Different 
2008-07-11
The latch lock pictured is not the one you get in the box. It is the sub $9.00 lock here:Master Lock Adjustable Coupler Latch Lock, Stainless Steel #2847DATSC The one in the picture looks like the ~$19.99 lock here: Masterlock 1475DAT Lshkl Brbll Lk 7/8"" " or the ~$14.00 one here: Coupler Latch Lock By Master Lock Company
I would have given this product the five stars if it had come with the pictured items. A bit of a bait and switch...
Great Product, but not exactly as pictured. 
2008-06-27
This is a great product. Very well constructed. I was able to use all the components, but the latch lock was not the one pictured on the site. Which is why I only gave it 4 stars. I brought this misleading info to the attention to Amazon, but they are yet to fix it. Master Lock's site should have the right photo for the 3774DAT.
Useful set 
2008-05-09
I have found two of the three locks in this set useful. The hitch lock did not fit on my trailer. Thus this only gets four stars.
Not Great 
2008-04-27
Two of the three components (locks) would not work in my applocation. The hitch receiver Lock was too short and the hitch losk (for trailer hich lock lever) was also too short. Could not use two out of three components.
Doesn't fit Ford Explorer Factory Hitches for 2006 and Up. 
2008-04-04
The product seems to be durably made, but the receiver hitch lock is too wide at the ends to fit in my factory installed hitch on the side where the electrical connections are made. What else can I say? It's useless to me. It's a bad design on the part of Ford, Master Lock or both.
The other two parts seem well made, and they fit my trailer OK.
I'm disappointed, but I've decided to return this set.
1 star for the receiver hitch
5 stars for each of the other pieces