Features & Benefits
- Heavy-duty trailer lock
- Hardened steel construction
- Prevents picking and copying of keys
- Secures safety chains in lock
- Patented design
- Made in the USA

Protect your trailer and belongings with a heavy-duty trailer lock, made with hardened steel and a tough exterior cover to prevent burglars from using power tools, hammers, and crowbars on your lock. Our unique key design prevents picking, while the patented design allows you to secure most standard S-hook style safety chains in lock.
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Protect your trailer and belongings with a heavy-duty trailer lock, made with hardened steel and a tough exterior cover to prevent burglars from using power tools, hammers, and crowbars on your lock. Our unique key design prevents picking, while the patented design allows you to secure most standard S-hook style safety chains in lock.
| Brand Name | Proven Industries |
| Recommended Uses For Product | Trailers, RVs, Safety Chains |
| Number of Pieces | 1 |
| Included Components | inner slide, exterior shield, puck lock |
| Model Number | 2 |
| UPC | 810104184311 |
| Model Name | 2178 |
| Manufacturer | Proven Industries, Inc |
| Unit Count | 1.0 Count |
| Manufacturer Part Number | 2178 |
| Additional Features | Weather Resistant |
| Lock Type | Disc-Detainer |
| Style Name | Traditional |
| Color | Black-Square |
| Material Type | Alloy Steel |
| Item Dimensions | 8.6 x 7.58 x 5.13 inches (21.8 x 19.3 x 13 cm) |
| Item Weight | 13.6 Pounds (6.17 kg) |
| Brand | Proven Industries |
| Special Feature | Weather Resistant |
| Item dimensions L x W x H | 8.6 x 7.58 x 5.13 inches (21.8 x 19.3 x 13 cm) |
| Material | Alloy Steel |
Ideal for users who frequently tow trailers and need reliable security for their 2-inch couplers.
Perfect for those who prioritize safety and security for their trailers and want to prevent theft.
Suitable for consumers favoring American-made products, as this lock is manufactured in the USA.
Individuals without trailers will find this product unnecessary and irrelevant to their needs.
Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square)
The Proven Industries Model 2178 Trailer Lock is a high-quality lock designed to fit 2-inch trailer couplers. Made in the USA, this blue lock not only secures the trailer coupler but also the safety chains, providing peace of mind when towing. One of the standout features of this lock is its solid Construction and durability. Customers Consistently praise the build quality, with many stating that it is the best coupler lock they have ever used. The lock is also available in different options to fit various coupler sizes, ensuring a snug and secure fit. While the lock does not cover the tongue bolts on the side, which may be a drawback for some users, it compensates by providing excellent protection for the trailer coupler. The lock's dimensions are 4.5 inches outside diameter and 4 1/4 inches inside diameter, meaning the coupler width should be less than 4 1/4 inches for it to fit properly. Customers seeking assistance with compatibility or any specific questions can reach out to Proven Industries directly. The company is known for being responsive and helpful, ensuring customers find the appropriate lock for their needs. Overall, the Proven Industries Model 2178 Trailer Lock is highly regarded by customers for its durability, secure fit, and ease of use. It may not cover the side bolts, but it provides exceptional protection for the trailer coupler, making it a reliable choice for towing safety.
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