--- product_id: 93701861 title: "Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square)" brand: "proven industries" price: "¥88123" currency: JPY in_stock: true category: "Proven Industries" url: https://www.desertcart.jp/products/93701861-proven-industries-model-2178-trailer-lock-fits-2-inch-trailer store_origin: JP region: Japan --- # Pick-resistant unique key design Hardened steel lock body Fits select 2-inch couplers securely Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square) **Brand:** proven industries **Price:** ¥88123 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in your trailer’s safety with Proven Industries’ ultimate anti-theft shield! ## Quick Answers - **What is this?** Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square) by proven industries - **How much does it cost?** ¥88123 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/93701861-proven-industries-model-2178-trailer-lock-fits-2-inch-trailer) ## Best For - proven industries enthusiasts ## Why This Product - Trusted proven industries brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Tailored Fit:** Custom-designed for select 2-inch trailer couplers and S-hook safety chains - • **Made in the USA:** Precision engineered and manufactured domestically for trusted quality - • **Unbreakable Security:** Hardened alloy steel resists power tools and brute force attacks - • **Pick-Proof Innovation:** Exclusive disc-detainer key system blocks lock picking and key duplication - • **Heavy-Duty Peace of Mind:** Robust 7.85 lb lock ensures your trailer stays exactly where you left it ## Overview The Proven Industries Model 2178 Trailer Lock is a heavy-duty, pick-resistant locking system crafted from hardened alloy steel. Designed specifically for select 2-inch trailer couplers and S-hook safety chains, this USA-made lock offers superior protection against theft with its unique disc-detainer key and rugged exterior shield. Weighing 7.85 pounds, it delivers robust security for your trailer or camper, ensuring peace of mind wherever you go. ## Description desertcart.com: Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square) : Automotive ## Features - HEAVY-DUTY TRAILER LOCK: It’s important to do everything you can to protect your belongings and your trailer or camper from being stolen. Our strong coupler lock fits select 2-inch trailer couplers to help keep your trailer secure. - TOUGH LOCK: The locking parts on this device are constructed from hardened steel for increased security, and the exterior cover is tough enough to stop burglars from using power tools, hammers, and crowbars on your lock. - UNIQUE KEY DESIGN: Our trailer lock has a special key design that prevents anyone from picking the lock. This innovative key system also features an interior locking mechanism that stops would-be thieves from making a copy of your key. - CUSTOM TRAILER-COUPLER LOCK: This custom-tailored lock will only mount on very specific 2-inch couplers. Make sure to check the coupler sizes that are compatible with our lock hardware to ensure that the lock you select matches your trailer coupler. - PROVEN INDUSTRIES: We are dedicated to providing our customers with the most effective trailer locks on the market. We carefully research and manufacture our locking systems from conception to fabrication in the USA. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0G8TXSVP1 | | Additional Features | Weather Resistant | | Best Sellers Rank | #36,405 in Automotive ( See Top 100 in Automotive ) #90 in Towing Hitch Locks | | Brand Name | Proven Industries | | Color | Black-Square | | Customer Reviews | 4.7 4.7 out of 5 stars (765) | | Included Components | inner slide, exterior shield, puck lock | | Item Dimensions | 8.6 x 7.58 x 5.13 inches | | Item Weight | 13.6 Pounds | | Lock Type | Disc-Detainer | | Manufacturer | Proven Industries, Inc | | Manufacturer Part Number | 2178 | | Material Type | Alloy Steel | | Model Name | 2178 | | Model Number | 2 | | Number of Pieces | 1 | | Recommended Uses For Product | Trailers, RVs, Safety Chains | | Style Name | Traditional | | UPC | 810104184311 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Proven Industries - **Item dimensions L x W x H:** 8.6 x 7.58 x 5.13 inches - **Lock Type:** Disc-Detainer - **Material:** Alloy Steel - **Special Feature:** Weather Resistant ## Images ![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square) - Image 1](https://m.media-amazon.com/images/I/81eQ70SwHTL.jpg) ![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square) - Image 2](https://m.media-amazon.com/images/I/71Dr3ZLZ2lL.jpg) ![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square) - Image 3](https://m.media-amazon.com/images/I/71n3B-87YZL.jpg) ![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square) - Image 4](https://m.media-amazon.com/images/I/714MZ+URWKL.jpg) ![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Made in The USA (Black-Square) - Image 5](https://m.media-amazon.com/images/I/716AgP1oYIL.jpg) ## Available Options This product comes in different **Color** options. ## Frequently Bought Together - Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue) - Proven Industries Model 2516 Trailer Lock, Fits 2 5/16-Inch Couplers, Secures Safety Chains, Made in The USA, (Blue) - Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/93701861-proven-industries-model-2178-trailer-lock-fits-2-inch-trailer](https://www.desertcart.jp/products/93701861-proven-industries-model-2178-trailer-lock-fits-2-inch-trailer) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-15*