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- Giant Mouse
We haven’t covered many slipjoint knives here on Multitool.org, and that’s something I’d like to change. There’s a lot of great slipjoint makers out there right now, and I’m not talking about the usual names like Case or Victorinox. I’m talking about companies pushing the “modern traditional” space with tighter tolerances, premium materials, and updated designs.
A great example of that is GiantMouse. Founded by Jesper Voxnaes and Jens Ansø, two designers with a long track record in the knife world, they’ve consistently put out designs that balance clean aesthetics with real usability. Slipjoints aren’t new territory for them either, and that experience shows.
![ResizedImage 2026 04 16 17 31 28 2654[2]](/cache/klixok2watermark/48e88ed4639d89e788e8ee0cda8e2d0a.jpg)
GiantMouse has always talked about lines. Not just lines on a blade or handle, but the way a knife flows visually and in the hand. Ansø and Voxnaes design with intention, and most of their knives share a familiar rhythm that makes them instantly recognizable.
The Nazca breaks that rhythm on purpose.

I’ve always leaned toward folders, but in the last couple of years I’ve noticed more people working compact fixed blades into their daily carry. That got me curious. Makers have really embraced the idea too, offering more small fixed blades than ever. Once I gave them a closer look, I realized the appeal—fast draw, no moving parts, and simple reliability. Since I usually prefer bigger blades in a folding format, I set myself a limit of around three inches for a fixed blade. Any larger and you’re just carrying extra handle and sheath.
That’s what led me to the Giant Mouse GMF1. It’s been around since 2016 and has earned a loyal following, so it felt like a good test case to see if a compact fixed blade could actually earn a spot in my rotation.

The GiantMouse ACE Iona V2 takes the beloved design of its predecessor and transforms it into a strong, reliable outdoor companion. Featuring a wider CPM Magnacut blade, a longer ergonomic handle, enhanced spine jimping, and improved lockbar access, this knife excels in both form and function.

What kind of people would write collect and review multitools? Quite simple really- we are designers and do-ers, outdoors types and indoor types, mechanics, doctors, problem solvers and problem makers. As such, we have, as a world spanning community, put every type, size and version of multitool, multifunction knife, pocket knife and all related products to every test we could manage in as many places and environments as there are.