Mod Grid Review: A Modular 3D-Printed EDC Organizer Worth Printing

Introduction

Two months after a well-regarded 3D-printed EDC organizer made the rounds, a new design has landed that changes the conversation entirely. Mod Grid, created by MakerWorld user 3D EDC (also known as Tiny Tool Shop), takes the modular spirit of Gridfinity and shrinks it down to a scale that makes sense for pocket tools. After spending time assembling and rearranging it, this is arguably the most flexible printed EDC organizer approach available right now.

What Is Mod Grid?

Gridfinity is a well-known open-source storage system: a 42 by 42 mm grid that expands infinitely, with containers that drop into base plates for organizing drawers, cabinets, and desks. It is hugely popular in the 3D printing community, and there are even online generators for making custom inserts. The only gap was that nothing similar existed for EDC, until now.

Mod Grid borrows that idea at a pocket-friendly scale. The base panel is a 4 by 12 grid, with each square measuring just under a quarter inch, roughly 5.5 mm per cell. Because it is modular, you snap in exactly the holders you need, wherever you need them, and rearrange everything as your carry evolves. That is the core appeal: instead of an organizer designed around one person’s tool selection, you build your own.

What Comes in the Download

The download file is generous. Alongside the base grid, you get a sled that holds 12 quarter-inch bits, which pops directly into the panel and turns it into a genuinely useful bit holder. The sled uses small clips on the back side to release, and while removal works, the clips are delicate. Repeated install-and-remove cycles will wear them down, so it is worth settling on a layout before fiddling endlessly.

Other included inserts cover a lot of common carry:

• A holder sized for a Swiss Army knife or a Victorinox pen
• Two slim holders suited to a mini pen, a small stash container, or a bit extender
• A holder sized for something like a classic SD
• A holder intended for 74 mm Swiss Army knives, which fits a little loose, so printing two and pairing them is recommended
• A larger clip for items like a Maratac peanut lighter or a MecArmy stash container
• Stacked clips that form a doubled-up holder for pliers, with room to slide in a Knipex tool and store a double-sided quarter-inch bit

Because the design files are available, you can copy and paste inserts to build whatever configuration you want.

Building a Loadout

The free-form side of the panel is where Mod Grid earns its keep. You simply place what you carry: a Victorinox Cadet, a stash container, an extension with a ratchet, Knipex pliers, and a double-sided flathead and Phillips bit, swapping pieces in and out in seconds. Compact setups come together naturally, such as a full bit kit with a Leverman ratchet driver, SOG PowerPint pliers, and a mini bolt-action pen, or a Knipex paired with a double-sided bit alongside a 74 mm Swiss Army knife, a MecArmy stash, and a ratchet wrench with extension and a bit adapter.

One practical printing note: PLA Plus turned out to be the better filament choice here. It has enough flex to survive repeated snap-in cycles, whereas more rigid materials make the thin clips prone to breaking. Printed magnetic variants in translucent PETG were stronger but less forgiving, with the legs wanting to snap when pushed in.

Community Modifications

The most exciting part of Mod Grid is what happens after people adopt it. One maker, Darian on MakerWorld, created an add-on that adds a magnet to a plate insert. It keeps Knipex pliers extra secure on the panel, and it also works as a parts holder: park screws or bits on the magnet while you are working on something.

Darian also adapted Mod Grid to fit the lid of the popular Icon ratchet kit, solving a common complaint that the kit has no room for pliers. A clip snaps onto the kit lid and holds a Workpro pliers tool firmly in place. The same idea scales further: a custom 6 by 14 grid matching the Icon lid dimensions adds even more capacity, enough to squeeze in a pen and an offset toothpick holder. The panel snapped into place perfectly on the first print, fitted by eye with calipers from the STL dimensions.

Beyond the Icon kit, the concept extends naturally to other surfaces. A panel could be sized for a Field Notes notebook lid, an Altoids tin, or a knife sheath carrying a ferro rod and a fire starter. At this point it starts to feel less like Gridfinity and more like a miniature MOLLE panel for your gear, and the community is already adapting it to fit Leatherman, SwissTool, and other EDC tools.

Things to Consider Before Committing

There are a few caveats worth knowing. The clips are the weak point: move inserts around a lot and they will wear out, though replacements are trivial to print. The 74 mm Swiss Army knife holder runs a little loose on its own. And you will need access to a 3D printer or a printing service, since this is a file download rather than a finished product. None of these are dealbreakers, but they shape the experience: plan your layout, print spares, and treat the clips gently.

Buying Advice

If you already own a 3D printer and carry a pocket multi-tool, Mod Grid is essentially a must-print. It costs only filament, and the modular format means it adapts rather than dictates. If you do not print, look for local printing services or check whether the MakerWorld listing offers printed fulfillment. Either way, the real value is in the open, expandable format, which is only getting more capable as the community adds holders and mounts.

Conclusion

Mod Grid is a smart, genuinely modular answer to a question the EDC community has been asking: why should drawer organization get all the good systems? It is compact, endlessly reconfigurable, and already growing through community mods. If your carry changes often, this is one of the most interesting organizer concepts to come along in a while.