The Festool 204846 Systainer3 L 137 is a modular storage case built for transporting and organizing tools, accessories, and consumables. This is a tool storage case designed for shop organization, vehicle transport, and jobsite carry-in. Model number 204846. If you already work in the Festool system or want a cleaner way to move gear from one place to the next, this is the kind of case that keeps everything protected and easy to grab.

What matters here is the L-format footprint. Festool gives this Systainer3 a broader base area, which means more room for larger layouts of gear than a smaller case without stepping outside the stackable Systainer platform. The outer dimensions are 20.00 inches long, 11.65 inches wide, and 5.39 inches high, with inner dimensions of 19.72 inches long, 10.83 inches wide, and 3.70 inches high. In plain terms, it is a low-profile storage option with useful width for accessories, hand tools, layout items, and job-specific supplies.

The T-LOC interface is one of the reasons Festool storage works so well in the real world. You can open, close, and connect the case in one movement instead of fighting separate latches and stack clips. That sounds small until you are loading out in the morning or trying to get one case open without tearing apart your whole stack. The front handle also keeps the carry position close to the body, which makes it easier to move when the case is loaded.

This case ships without a tool insert, which is actually a plus for a lot of users. It gives you an open interior to set up for your own workflow instead of paying for a molded insert you do not need. For electricians, finish carpenters, installers, and service techs, that flexibility matters. You can dedicate it to specialty tools, loose accessories, fasteners, or job-specific kits and keep them separate from your main power tool cases.

On the protection side, Festool positions the Systainer3 line as a way to keep contents organized and protected against dust, spray water, and normal transport abuse. The SYS3 L 137 also carries a 44.09 lb load capacity, an 88.18 lb connected load capacity, and a 220.46 lb lid load rating. That gives it enough strength for real stacking and transport use, not just shelf storage. At 4.19 lbs, it is light enough to move easily before you even start loading it out.

Compatibility is a big part of the value. The Festool 204846 Systainer3 L 137 works with other Systainer generations, Festool mobile dust extractors, and selected system accessories. Festool also notes integration with bott vehicle equipment, which makes it a practical fit for trades that run organized vans and need repeatable storage instead of loose boxes and bins sliding around in transit.

Who should buy it? Anyone who already owns Festool Systainers will get the most immediate payoff, because this case drops straight into an existing stack and transport routine. It also makes sense for pros who want a durable modular storage case with a clean footprint and better organization than generic plastic totes. If you need a compact, wide-format case for custom organization rather than a pre-molded tool insert, this one is a smart pick.

Festool 204846 Systainer3 L 137 keeps loose gear from turning into truck clutter

This is a straightforward, useful Festool storage case that makes the most sense for pros who want wider low-profile storage and full Systainer compatibility.

• Who it's for: Tradespeople, installers, and organized DIY users building out a real storage system for tools, accessories, and job-specific kits.
• Why it stands out: The wider footprint, one-turn T-LOC operation, and cross-compatibility with older Systainers and Festool transport gear make it more than just another plastic box.
• Worth knowing: There is no insert included, so this is best for custom organization. That is a plus if you know exactly how you want to load it.

• Will this Festool storage case connect to older Systainers? Yes. Festool states that Systainer3 products can connect to previous Systainer generations.
• Does the SYS3 L 137 include an internal insert? No. Festool specifically lists this version as being supplied without a tool insert.
• How much weight can it carry? The listed load capacity is 44.09 lbs, with a connected load capacity of 88.18 lbs and a lid load rating of 220.46 lbs.
• Is it meant only for shop storage? No. It is built for workshop, vehicle, and construction site transport as part of the Festool Systainer system.