Hero image 0 of Master Lock Weather Resistant Trailer Hitch Lock with Keys, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Couplers, 0 of 7
Master Lock Weather Resistant Trailer Hitch Lock with Keys, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Couplers
Key item features
- Robust Security: Guards against trailer towaway theft, making it ideal for vehicles, trailers, and RVs.
- Durable Construction: Constructed from zinc to resist rust and corrosion, ensuring longevity and performance.
- Advanced Locking: Features an advanced locking mechanism designed to resist picking and prying attempts.
- Universal Fit: Accommodates 1-7/8 in. (48mm), 2 in. (51mm), and most 2-5/16 in. (59mm) trailer couplers.
- Included Accessories: Each package contains one high-strength trailer coupler lock and two precision keys for reliable access.
Generated by AI
Specs
- Towing lock typeHitch Lock
- MaterialZinc
- FeaturesWeather-Resistant
- Vehicle fitment typeUniversal
- Vehicle typeTrailer
- Vehicle model377KA (KA0501)
Current price is USD$33.69
Price when purchased online
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About this item
Product details
The Master Lock 377KA Trailer Hitch Lock offers robust security features, making it an essential accessory for trailers, RVs, and vehicles. Constructed from durable zinc to combat rust and corrosion, it ensures longevity and performance. Its universal fit accommodates 1-7/8 in. (48mm), 2 in. (51mm), and most 2-5/16 in. (59mm) trailer couplers, providing versatile use. The lock’s advanced mechanism is designed to resist picking and prying, maintaining the safety of your trailer. Each package includes a high-strength trailer coupler lock and two precision keys for reliable access.
- Guards against trailer towaway theft. Best used for vehicles, trailers, and RVs.
- Trailer hitch lock is constructed from zinc to resist rust and corrosion and features an advanced locking mechanism to resist picking and prying.
- Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers
- One trailer coupler lock, two keys
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.
Specifications
Towing lock type
Hitch Lock
Material
Zinc
Features
Weather-Resistant
Brand
Master Lock
Warranty
Warranty information
Limited lifetime Warranty
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Customer ratings & reviews
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Showing 1-3 of 10 reviews
Dec 9, 2025
Doug
5 out of 5 stars review
Verified Purchase
Excellent lock
This is the best type of hitch lock I have been able to find. It fits securely in the ball socket of the trailer hitch. The locking mechanism fits snugly to the outside of the hitch socket. The construction is robust. Unauthorized removal without the key would be very difficult. This Master Lock trailer hitch lock provides me peace of mind. My nice trailer is secure.
Incentivized Review
Helpful?1PPW09D236X4197811252
Dec 23, 2025
Josh
5 out of 5 stars review
Verified Purchase
Master lock
Thanks master lock keep up the good work.
Incentivized Review
Helpful?1PPW09D236X4197811252
Dec 27, 2025
gwen
5 out of 5 stars review
Verified Purchase
This is a great design. High security
Incentivized Review
Helpful?1PPW09D236X4197811252
