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Master Lock

Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks 389DAT, 4 Pack

  • Based on 17,109 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Aug 13
Order within 11 hours and 19 minutes
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Size: 4 Pack


Features

  • These 4 locks have different key numbers. The similar 379KA coupler locks are available keyed alike. The only difference between this one (389DAT) and the 379KA is the color.
  • Universal coupler lock fits virtually all 1-7/8", 2", and 2-5/16" trailer couplers.
  • This lock protects unattended trailers and guards against tow-away theft. The bright red finish discourages thiefs from messing with your trailer.
  • Resists rust and corrosion. Simple installation and removal.

Description

4 pack

Manufacturer: ‎Master Lock


Brand: ‎Master Lock


Item Weight: ‎5.96 pounds


Product Dimensions: ‎16.5 x 9 x 8 inches


Item model number: ‎389DAT


Manufacturer Part Number: ‎389DAT


Date First Available: January 2, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Strong tuff lock
Size: 3 Pack
These toung locks work great ,I have 3 trailers and I use these anytime my truck isn't hooked up to trailer
Reviewed in the United States on June 8, 2025 by Tonywalker
    • Nice product
Size: 1 Pack
Very durable and secure. Had it on my boat trailer outside and no rust. My boat stayed secure. Keys always went in without trouble. This is a good bit for your trailer for extra security.
Reviewed in the United States on May 29, 2025 by TE
    • Very nice
Size: 1 Pack
Works fantastic!!
Reviewed in the United States on June 19, 2025 by navydoc192
    • Great protection for my trailer
Size: 1 Pack
It is a good choice
Reviewed in the United States on April 3, 2025 by Hank
    • Bought a second one after using the first one.
Size: 1 Pack
Love the side key entry position. My old lock had to be locked from below and sometimes I had to get on the ground to see the entry point. Liked it so well I bought another one. Now I have 2 red ones and need to keep the keys identified.
Reviewed in the United States on May 10, 2025 by jr111
    • Great Master Lock!
Size: 1 Pack
Review Image by Erik S. Anderson Erik S. Anderson
Great lock! Makes me feel better knowing that I have this on my utility trailer. I'm sure if somebody really wanted to break this lock they could. But at least it will hopefully make somebody work to break it off. It seems heavy duty and durable, and it's very easy to install, and best of all, it doesn't break the bank. So far, I'm happy with my Purchase ... show more
Reviewed in the United States on April 27, 2025 by Erik S. Anderson Erik S. Anderson
    • Tow hitch lock
Size: 1 Pack
Safety first. This item is easy to put on and does the job.
Reviewed in the United States on May 2, 2025 by Stefanie Okada-McCabe
    • Saved our trailer from theft!
Size: 1 Pack
Review Image by Mike Mike
Review Image by Mike Mike
LEGIT saved our trailer. Someone tried to steal it while parked at storage and this lock held up. Lifetime customers.
Reviewed in the United States on April 30, 2025 by Mike Mike

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