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This collection covers hasp locks and components purpose-built for job site boxes, cargo containers, and steel enclosures. The Proven Locks hasp system uses tamper-resistant hardware that resists grinder and pry attacks, making it the right call when you need to secure heavy equipment or tools that can't be locked inside a standard building. Designed to work with steel storage and shipping containers, these products close the gap between locked and actually secure.

Open-door trailer theft is one of the most common job site security failures — a crowbar under a standard hasp or a quick bolt-cutter swing on an exposed shackle can open most generic setups in seconds. Proven's hasp kits remove those attack surfaces.

  • Hasp kits compatible with steel job site boxes and cargo containers
  • Tamper-resistant design limits grinder attack angles on the shackle
  • Pairs with puck locks for a fully closed-shackle system
  • American-made hardware
  • Free same-day shipping

Made in USA  |  Free Same-Day Shipping  |  Lifetime Warranty

Select your storage setup and pair a hasp kit with a Proven puck lock for maximum container security.

Model 400XL Puck Locks Proven Locks Blue (Billet 6061 Aluminum) Keyed Differently
Model 400XL

Model 400XL Puck Locks

$50.00

Model 400XL-SS Puck Locks Proven Locks Keyed Differently
Model 400XL-SS

Model 400XL-SS Puck Locks

$125.00

Model 400-SS Puck Locks Proven Locks
Model 400-SS

Model 400-SS Puck Locks

$125.00

Cargo Door Lock other locks Proven Industries
Cargo Door Lock

Cargo Door Lock other locks

$163.99

    Category

    • Shop All
    • All Trailer Coupler Locks
    • 2” TRAILER COUPLER LOCKS
    • 2 5/16” TRAILER COUPLER LOCKS
    • WHEEL LOCKS
    • Gooseneck Locks
    • PUCK LOCKS
    • HASP
    • HITCHES
    • HITCH ACCESSORIES
    • OTHER LOCKS
    • Apparel

Frequently Asked Questions

Use more than one lock point: a closed-shackle hasp-and-puck system on the main access point, plus a lock on any additional latch.

A standard padlock leaves its U-shaped shackle exposed. A closed-shackle system removes that exposed loop, so there's nothing for a bolt cutter to grab.

The Cargo Door Lock locks the two innermost vertical bars together. It works on semi-trailers, sea containers and cargo trailers, adjusts from 9-1/8" to 15-7/8", and needs no permanent mounting.

The corner-mount hasp kit is built from 3/16" steel with a 1/4" hasp shield, and it includes a puck lock.

Yes. Choose the keyed-alike option and every lock in your order will work with the same key.

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