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Your cart is empty.The Master Lock No. 377KA features a trailer coupler lock, designed to fit 1-7/8 inch (48mm), 2 inch (51mm) and most 2-5/16 inch (59mm) trailer couplers. The advanced locking mechanism provides resistance to picking and prying. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.
Hankenstein
Reviewed in the United States on February 4, 2025
Use this on my boat trailer
Marilyn S Kincaid
Reviewed in the United States on September 25, 2024
Just what the hubby wanted but I don't know anything about this product.
Twiggy
Reviewed in the United States on September 1, 2024
This was a perfect buy. Love it and feel a bit safer with it.
Donnie
Reviewed in the United States on August 13, 2024
Easy to use great easy to use
David
Reviewed in the United States on August 1, 2024
Very good and strong lock
Ryan
Reviewed in the United States on July 15, 2024
Great lock easy to use. Fast to install. Very happy with this product
Clan Bacon
Reviewed in the United States on December 15, 2024
As others have stated, this is a good lock that fits most trailer hitches. Master has switched from a stainless steel to aluminum housing for this lock which does make it a little lighter in weight and does limit the potential for corrosion (although the older one we have had for 20-ish years is still not corroded). Good lock for the money to protect a much larger investment.
Rick S.
Reviewed in Australia on November 23, 2024
Works well, decent weight to it. Won't cut through it too quickly. Fits the trailer hitch well and gives the hitch cover a place to go when a trailer is on.
Brian E Duguay
Reviewed in Canada on October 5, 2024
Does the job and easy to use.
Stuart Serediuk
Reviewed in Canada on October 4, 2024
The quality is of what I expected from a master lock. Sturdy and the locking mechanism is smooth.
Bushra
Reviewed in the United Arab Emirates on July 13, 2020
مثل المتوقع شكرا لكم
E H
Reviewed in Mexico on February 5, 2020
Muy buen producto quedo perfecto en mi remolque y la entrega súper puntual.
Richard Williams
Reviewed in the United States on October 28, 2019
Bought my first one 15 years ago and it still works great, you can push it shut in a ratching fashion without even having the key in it. Fits trailers with 1 7/8" , 2" and 2 5/16" ball socket. Bought another for a second trailer. The design would make it difficult to pry it saw off. Much better than the u-bolt over the top design which only locks on one side and could be sawed quickly with a saws all of pryed in the non-locking side. For extra security use one of these and a lock through the latch and it isn't going anywhere.
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