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The Master Lock 379ATPY Trailer Tongue Lock is a universal, heavy-duty coupler lock designed to secure trailers, RVs, campers, and boat trailers. Engineered with a pick- and pry-resistant locking mechanism and constructed from rust-resistant zinc, it fits the three most common coupler sizes (1-7/8", 2", and 2-5/16") and includes two keys for convenience. Ideal for outdoor use, this lock offers reliable theft deterrence and weather durability, making it a top choice for professional and recreational trailer owners alike.






















| ASIN | B000L9QRE8 |
| Additional Features | Anti-Corrosion, Cut Resistant, Weather Resistant |
| Best Sellers Rank | #986 in Automotive ( See Top 100 in Automotive ) #3 in Towing Hitch Locks |
| Brand Name | Master Lock |
| Color | Black |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 4.6 out of 5 stars (5,995) |
| Finish Types | Polished |
| Global Trade Identification Number | 00071649229220 |
| Included Components | Unit^Instruction Guide |
| Item Dimensions | 5.1 x 3.5 x 4.6 inches |
| Item Highlight | Universal Trailer Coupler Lock Secures RVs, Campers, Boat and Utility Trailers from Theft, Resists Rust, 2 Keys, Black |
| Item Type Name | Universal Trailer Hitch Lock |
| Item Weight | 16 ounces |
| Lock Type | Key Lock |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 379ATPY |
| Manufacturer Warranty Description | 1 year manufacturer |
| Material Type | Zinc |
| Model Name | Universal Towing Coupler Lock, Steel |
| Model Number | 379ATPY |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Recommended Uses For Product | vehicles, trailers, RVs |
| Shape | Rectangular |
| Style Name | Trailer Hitch Lock |
| UPC | 071649229220 |
| Unit Count | 1 Count |
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