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The Master Lock 379ATPY is a universal trailer hitch lock engineered to fit multiple coupler sizes (1-7/8", 2", and 2-5/16") and provide robust security with an advanced pick- and pry-resistant locking mechanism. Crafted from corrosion-resistant zinc, it offers durable, weatherproof protection for RVs, horse trailers, and tool trailers alike. Easy to install and operate without tools, its sleek black finish delivers a professional look while signaling serious theft deterrence. Trusted by thousands, it’s the go-to choice for hassle-free, reliable trailer security.






















| ASIN | B000L9QRE8 |
| Additional Features | Portable |
| Best Sellers Rank | #2,266 in Automotive ( See Top 100 in Automotive ) #10 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 (5,958) |
| 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 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 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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