Handle and Ergonomics
At 5.4 inches overall with a 2.6-inch blade, the GMF1 is definitely a three-finger knife. The handle is short—2.8 inches—but for my average hands it still works. My ring finger just squeezes in, and my index finger gets plenty of purchase to steer the blade. The jimping is smartly placed along the index, spine, and tail, adding security where it matters most. Even though the handle is small, those details keep it locked in. In a pinch grip it practically disappears, which makes it comfortable for detail tasks.
Blade and Performance
The flat-ground drop point is cut from N690, a steel with a track record for toughness, edge retention, and corrosion resistance. It’s not the latest powder steel, but it’s dependable, sitting in the same tier as VG-10 or 440C. The geometry gives it good slicing ability, and while I sometimes wished for a bit more handle when pushing through tougher material, the blade itself never felt underpowered. For its size, it balances performance and carryability really well.
Sheath
Giant Mouse ships the GMF1 with a handcrafted Italian leather sheath that works left or right side. In my use, right-side draws felt smoother. After surgery left me down an arm, I experimented with both sides and noticed the flap orientation makes a real difference in how the knife clears. The leather is excellent quality and carries flat, but if you prefer something lower profile, Giant Mouse also offers a Kydex taco sheath. That one’s my pick—it hugs close to the waistline, skips the bulk of a Tek-Lok, and locks in with solid retention. I do wish it had a small thumb ramp for an easier push-off, but even without it, it’s a great sheath.
Final Thoughts
The GMF1 shows just how much capability you can squeeze into a very small package. You give up a full four-finger grip, and some folks may find it too small for extended use, but that’s the tradeoff for its portability. Between the thoughtful ergonomics, reliable blade, and sheath options, it’s a fixed blade that actually makes sense to carry every day. If you’ve been on the fence about trying a compact fixed blade, the GMF1 is one worth considering.
