Buck EdgeTek diamond sharpeners
Buck's how-to page says a diamond sharpener can be used dry or wet, with water or water-based honing fluid and not petroleum-based oil, and warns that too much pressure can crush or remove the grit. Buck's 2026 catalog lists its EdgeTek surfaces as "100% Diamond-coated" and numbers EdgeTek grits 325, 750 and 1200.
Buck's 2026 catalog puts a number and a word on each EdgeTek grit, such as the Ultra FlipStik's "325 (Coarse) 750 (Medium) 1200 (Fine)." Those are the three words Buck's how-to page gives its stages: Stage 1, heavy sharpening for nicks, inconsistent edges or extremely dull blades, on a coarse grit; Stage 2, medium to final sharpening and quick touch-ups, on a medium grit; Stage 3, fine sharpening, on a fine grit or a natural stone. Grit labels across makers are explained in sharpening grit, and do you need different grits asks whether one knife needs several.
Buck's catalog lists the EdgeTek Dual Flat Pocket Stone with "100% Diamond-coated surfaces," grits of 325 and 750, and a black vinyl sheath. Buck's how-to page writes its stage method for "a stone or steel" in general: the stroke can be straight, hilt to tip or tip to hilt, or circular, always cutting into the stone with the edge facing the stroke, and the how-to recommends the circular stroke because it helps you hold the angle. Buck's how-to also warns not to let the tip skip off the end, which can round it. Its full stages are laid out in how to sharpen a pocket knife.
Buck's catalog prints the FlipStik grits one model at a time: the Ultra FlipStik carries 325, 750 and 1200 on "100% Diamond-coated, oval surfaces"; the Field FlipStik is "750 (Medium) both sides"; the Fishing FlipStik is "325 (Coarse hook grooves) 750 (Medium, flat)." Buck's catalog adds that each FlipStik handle doubles as a case that twists to lock. For a small portable sharpener, Buck's how-to page says to "stroke the blade in nearly a straight direction," without saying which EdgeTek counts as one. For Buck's steels, the how-to says in Stage 1, the rough cut, that "Buck's EdgeTek steels or stones will do the trick." How honing differs from sharpening is a separate question, taken up in honing versus sharpening.
Buck's how-to page says "Diamond Sharpeners can be used dry or wet," and for a lubricant it gives "water or water-based honing fluid, not petroleum-based oil." Kershaw's page for its own Ultra-Tek, a diamond-coated shaft stored in a handle, says "Requires no water or oil to use." Buck's how-to adds that too much pressure can crush or remove the grit from a diamond sharpener and will fatigue the user. What other stones take is covered in oil on a sharpening stone.