Description
MIA's Description
The lock features an advanced locking mechanism that resists tampering and is constructed to be rust and corrosion resistant for outdoor use. Installation and removal are quick and easy.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Master Lock |
| Part Number | M014 379ATPY |
Videos
(1532) Master Lock Trailer Couplers (379ATPY & 389DAT) (JUNK!)
Unboxing & Overview: Master Lock Universal Trailer Coupler Lock
About Master Lock Universal Trailer Coupler Lock
![[665] Master Lock Trailer Coupler Lock Picked FAST (Model 379ATPY)](https://img.youtube.com/vi/iQHfADaPxfA/hqdefault.jpg)
[665] Master Lock Trailer Coupler Lock Picked FAST (Model 379ATPY)
![[809] TERRIBLE Master Lock Trailer Coupler Lock Picked (Model 377DAT)](https://img.youtube.com/vi/f5pV1dOlrw0/hqdefault.jpg)
[809] TERRIBLE Master Lock Trailer Coupler Lock Picked (Model 377DAT)
Video 18 - Newbie vs. Master Lock 389DAT Trailer Coupler Lock - No tension lever needed :)
About Master Lock Heavy Duty 2-5/16" Coupler Lock
Can MASTER Trailer Hitch Lock Be Easily Picked? (Let's Find Out!)
Reese Coupler Lock for Travel Trailers | Product Review | Trailer Lock
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy