Mantis GH2022TB GearheadMantis Gearhead 440C Tanto, Aluminum Frame, Brass Ring. Never used. LNIB as from factory. Mantis GH2022TB Gearhead Folding Knife 3. 38" Black Stonewashed Tanto Combo Blade, Gray Aluminum Handles with Brass Ring, Liner Lock (no box) the GH Series Gearhead folding knife by Mantis Knives. The "steampunk style" Gearhead liner lock folder is equipped with a unique gear driven pivot with one large gear, three small gears and a thumb lever used to deploy the