



🔐 Lock in your trailer’s safety and leave worry behind!
The Master Lock 389DAT Trailer Coupler Lock offers universal compatibility with 1-7/8", 2", and 2-5/16" couplers, featuring an advanced locking mechanism that resists picking and prying. Its bright red, rust-resistant brass finish deters theft while ensuring durability. Easy to install and backed by a Limited Lifetime Warranty, it’s the trusted choice for securing trailers and RVs with confidence.
| ASIN | B01MYCT0LG |
| Additional Features | Advanced locking mechanism, Resists picking and prying, Rekeyable |
| Best Sellers Rank | #3,186 in Automotive ( See Top 100 in Automotive ) #10 in Towing Hitch Locks |
| Brand | Master Lock |
| Brand Name | Master Lock |
| Color | Red |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.7 out of 5 stars 17,380 Reviews |
| Finish Types | Painted |
| Global Trade Identification Number | 00071649263019 |
| Included Components | Coupler Lock |
| Item Dimensions | 3.6 x 7.6 x 6.7 inches |
| Item Type Name | Automotive Towing |
| Item Weight | 16 ounces |
| Item dimensions L x W x H | 3.6 x 7.6 x 6.7 inches |
| Lock Type | Key Lock |
| Manufacturer | Master Lock |
| Manufacturer Warranty Description | MASTER LOCK PRODUCT WARRANTY Limited Lifetime Warranty Master Lock Company LLC (“Master Lock”) grants the following warranty: If this product or any part of the product fails due to a defect in materials or workmanship at any time during the life of the product, Master Lock will, at its own discretion, repair or replace the product or part free of charge. Simply contact Master Lock at www.masterlo… |
| Material | Brass |
| Material Type | Brass |
| Model Number | 379ATPY |
| Recommended Uses For Product | securing trailers |
| Special Feature | Advanced locking mechanism, Resists picking and prying, Rekeyable |
| Style Name | Master Lock |
| UPC | 071649263019 |
| Unit Count | 1.0 Count |
S**E
Good and Safe
Works well, good deterrence for keeping your trailers safe.
J**E
Great Lock for Trailer Security!
I bought the Master Lock Universal Trailer Coupler Lock, and it's been a great addition to my RV setup. It fits perfectly on my 2-inch coupler. It’s solid, durable, and provides that extra layer of security when I’m parked at campgrounds or when my trailer’s stored. The lock is easy to use—just slide it on, lock it in place, and I feel much more confident leaving the trailer behind. It’s made of heavy-duty materials, so I’m not worried about it rusting or breaking. Overall, this Master Lock is a great value for the price and provides peace of mind that my trailer is secure. I highly recommend it to anyone with a trailer or RV!
N**S
Perfect, affordable, secured
The Master Lock Trailer Tongue Lock is a solid choice for securing your trailer. Its sturdy build and durable materials ensure quality and longevity. The lock provides excellent security, deterring potential thieves with its robust design and tamper-resistant features. Plus, its ease of use makes securing your trailer hassle-free, allowing for quick installation and removal. Overall, it's a dependable option for safeguarding your valuable cargo on the road. I’m going to buy more for my other trailers!
L**N
Nice easy to use lock
Easy to use lock. Not theft proof but a good deterrent
A**F
Great solid lock
This lock has some weight to it. It works great and feels solid. It didn’t fit on my utility trailer but that’s due to my trailer and not this lock. I gave this one to a friend and it has worked on his trailer flawlessly. Definitely worth the money. If it had actually worked on my trailer tongue I’d definitely be keeping it.
G**D
Great products and services
Great products and customer service.
A**Z
Looks good works great
Great look works great
K**.
Seems like a good quality lock.
Seems to be a relatively secure tongue lock. I would not say it’s overbuilt, however it seems like it would deter the common, opportunistic thief. A well equipped thief could defeat most any lock and there’s always that someone that thinks ahead and simply chain wraps a trailer tongue and drives away. For my purpose though, I think this will be more than satisfactory. It fits tightly to my 2” trailer tongue and the lock cylinder operates very smoothly. I recommend this tongue lock considering the MasterLock name and my personal observations.
Trustpilot
4 days ago
1 month ago