--- product_id: 207134106 title: "Proven Industries Puck Lock Set, Model 400XL, 3-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Black" brand: "proven industries" price: "$402.13" currency: USD in_stock: true url: https://www.desertcart.us/products/207134106-proven-industries-puck-lock-set-model-400xl-3-pack-hidden store_origin: US region: United States of America --- # Aircraft-grade 6061 aluminum for max durability Unique anti-pick key design, 2 keys per lock Hidden, fully shielded shackle resists bolt cutters Proven Industries Puck Lock Set, Model 400XL, 3-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Black **Brand:** proven industries **Price:** $402.13 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in security, unlock peace of mind. ## Quick Answers - **What is this?** Proven Industries Puck Lock Set, Model 400XL, 3-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Black by proven industries - **How much does it cost?** $402.13 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/207134106-proven-industries-puck-lock-set-model-400xl-3-pack-hidden) ## 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 - • **Invisible Shield:** Hidden shackles fully shielded to thwart bolt cutters and prying tools—your trailer’s silent guardian. - • **Unbreakable Armor:** Crafted from aircraft-grade 6061 aluminum, these locks stand tough against corrosion and physical attacks. - • **Pick-Proof Precision:** Specialized key design prevents lockpicking and unauthorized key duplication for ultimate security. - • **Perfect Fit, Effortless Use:** Generous 1 3/4" x 1 3/4" shackle opening fits swivel hasps on enclosed trailer doors seamlessly. - • **Made in the USA, Trusted Worldwide:** Proven Industries’ dedication ensures top-tier quality from concept to fabrication, supporting your peace of mind. ## Overview The Proven Industries Model 400XL Puck-Lock Set is a heavy-duty, corrosion-resistant security solution made from aircraft-grade 6061 aluminum. Featuring a hidden, fully shielded shackle and a unique anti-pick key design, these locks provide superior protection for enclosed trailer doors. Each pack includes 3 locks and 6 keys, all keyed alike for convenience, proudly manufactured in the USA. ## Description Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Black) ## Features - HEAVY-DUTY PUCK LOCKS: It’s important to do everything you can to protect your belongings and your trailer from being stolen. Our strong and pick-resistant puck locks help keep your rear and side enclosed trailer doors secure. - TOUGH PUCK LOCKS: These padlock cylinders are constructed from aircraft-grade 6061 solid aluminum, so they’re resistant to picking and corrosion. Each lock features a hidden and fully shielded shackle that protects against bolt cutters and prying tools. - UNIQUE KEY DESIGN: Our puck locks have a special key design that prevents lockpicking and deters would-be thieves from making a copy of your lock keys. Each lock comes with 2 keys, and all keys are keyed alike for your convenience. - LOCK DIMENSIONS & SIZES: Each puck lock has a large opening on the back to accommodate for swivel hasps on an enclosed trailer door. The shackle opening measures 1 3/4" L x 1 3/4" W x 7/8" H and has a depth of 1 1/4". - 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 | |---------------|-------| | Brand | Proven Industries | | Special Feature | Key Lock | | Lock Type | Key Lock | | Material | Aluminum | | Recommended Uses For Product | Securing enclosed trailer doors, protecting personal possessions | | Style | Modern | | Color | Black | | Number of Pieces | 3 | | Included Components | 3 puck locks and 6 keys | | Controller Type | Hand Control | | Shape | Rectangular | | Control Method | Touch | | UPC | 729573594784 729573594661 | | Model Name | Model 400XL | | Manufacturer | Proven Industries | | Item Weight | 3.19 pounds | | Package Dimensions | 6.73 x 3.43 x 3.31 inches | | Country of Origin | USA | | Item model number | 400XL | | Manufacturer Part Number | 400XL | | Bulb Type | lock | | Special Features | Key Lock | ## Product Details - **Brand:** Proven Industries - **Special Feature:** Key Lock - **Lock Type:** Key Lock - **Material:** Aluminum - **Recommended Uses For Product:** Securing enclosed trailer doors, protecting personal possessions ## Images ![Proven Industries Puck Lock Set, Model 400XL, 3-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Black - Image 1](https://m.media-amazon.com/images/I/61Qaa3VE45L.jpg) ## Available Options This product comes in different **Color** options. ## Frequently Bought Together - Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Black) - Proven Industries Model 2516 Trailer Lock, Fits 2 5/16-Inch Couplers, Secures Safety Chains, Made in The USA, (Black) --- ## 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.us/products/207134106-proven-industries-puck-lock-set-model-400xl-3-pack-hidden](https://www.desertcart.us/products/207134106-proven-industries-puck-lock-set-model-400xl-3-pack-hidden) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-27*