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In 2024 and 2025, the tool world watched something uncommon play out: a patent fight between two major brands over modular tool storage. Milwaukee Tool, known for its PACKOUT system, filed a legal complaint alleging that Klein Tools MODbox storage line infringed on multiple Milwaukee patents covering stacking, locking, and coupling features of modular storage products. The case drew attention not just because it involved intellectual property, but because it was directly tied to a category of products that tradespeople depend on every day.

Milwaukee (and its partner Keter) went so far as to seek legal action aimed at blocking imports of certain Klein modular containers that they said relied on patented PACKOUT technology, while also pursuing litigation in federal court. This wasn’t simply online talk or social media rumble, it was formal, documented legal action centered on three patents Milwaukee asserted covered critical elements of modular stacking and locking systems.

Klein has not publicly detailed its strategy or how the lawsuit has impacted product planning, but we do know that several original MODbox tool box models were marked “no longer in production” around late 2025, and those moves coincided with legal pressures in the modular storage space. That raises a question a lot of pros have been asking: Did the lawsuit push Klein to rethink how they design MODbox shelving, latches, and connection mechanics? We won’t speculate on internal strategy, but the results are here, and they show thoughtful, functional upgrades that go beyond simple compliance.

What’s New in the 2026 Klein MODbox Lineup

Klein has refreshed key MODbox products for 2026, introducing updated mechanics, improved interoperability, and smarter usability features. These changes respond to real user needs on the jobsite, and, whether or not the legal backdrop played a role, they make a meaningful difference in daily use.

Below are the core updated models, all part of the refreshed MODbox ecosystem:

Klein Tools MODbox Rolling Toolbox (KLN-54100MBX)
Offers rugged mobility with 10-inch solid rubber wheels and 250-lb load rating, plus a case-compatible lid and attachment rails for system expansion.

Klein Tools MODbox Medium Toolbox (KLN-54200MBX)
Mid-size storage with a removable tool caddy and built-in headlamp bracket, designed for everyday tool access and organization.

Klein Tools MODbox Small Toolbox (KLN-54300MBX)
A compact toolbox that plays well in stacked systems.

Klein Tools MODbox Component Box, Full Width (KLN-54400MBX)
Wide modular organizer for parts and accessories.

Klein Tools MODbox Component Box, Half Width (KLN-54500MBX)
Half width organizer optimized for smaller parts.

These updated models are now widely listed on Klein’s official product index and retailer catalogs under new system numbers.

Redesigned Latches and Connections

One of the biggest differences in the 2026 MODbox products is what you don’t immediately notice: the old exposed metal wire latches are gone. They’ve been replaced with recessed, spring-loaded latches built into the case body.

What that means in real terms for folks in the trades: Connectors and latches no longer protrude where they can snag on rope, harnesses, or rigging. The system looks cleaner and integrates better as a stack, especially in trucks and vans and stacking and unstacking feels smoother in everyday use (especially important when you’re managing heavy loads).

Whether this update was influenced by external pressures or was simply the next step in product development, the new approach feels more pro tool, less hardware-store shelf.

Updated Lid Compatibility for KNECT and Accessories

Another subtle but practical improvement on these refreshed MODbox units is how the lids play with other Klein cases. Klein has made the lid surfaces more friendly to KNECT accessory cases and compatible storage modules, which means you can combine MODbox units with power tool organizers or accessory containers with less fuss.

That’s a big deal for professionals who build custom storage towers in their vans: better integration without bulky adapters and fewer loose pieces to manage.

Features That Matter on the Jobsite

Beyond latches and lids, Klein didn’t overlook the everyday use cases that matter:

Rolling Toolbox with Rugged Mobility
The KLN-54100MBX Rolling Toolbox includes 10-inch solid rubber wheels and a removable telescoping handle, built for hauling heavy gear across uneven terrain.

Medium Toolbox Practicality
The KLN-54200MBX features a removable tool caddy and bracket space for a headlamp, making it easy to access tools without clutter.

Smarter Box Design
Component boxes (full and half width) now match the modular ecosystem more smoothly, letting you organize smaller parts or specialty gear without paying for unnecessary box depth.

These aren’t flashy add-ons, hey’re real, practical updates that make workflows smoother from pickups to jobsite setups.

At Ohio Power Tool, we always look at product changes through the lens of how they impact pros on real jobs. The 2026 MODbox lineup isn’t just a refresh with new SKUs, it feels like Klein stepped back, looked at how people are actually using their system, and made practical decisions that make daily work easier.

The lawsuit context adds an interesting narrative layer, but at the end of the day what matters most to the professionals we serve is functionality, durability, and compatibility. These updated MODbox products deliver on all three fronts, and the new latch and lid designs suggest Klein is listening to pros just as much as they’re navigating the competitive landscape.

If you want help building a customized stack or integrating MODbox into your tool setup, our team at Ohio Power Tool has the experience to make it work seamlessly with your workflow. Don’t hesitate to reach out at cs@ohiopowertool.com or 614-481-2111 with any questions, comments, or concerns, and be sure to follow us on all your favorite social media channels to stay in the know on all the latest announcements, deals, news, and more!