To sharpen a pocket knife, find the angle the maker ground (a marker on the bevel shows it), then sharpen each side on a stone or guided tool until you can feel a small burr along the whole edge, and finish on a finer grit or a strop. Most folders are ground between about 13 and 22 degrees per side, depending on the brand. Plain edges go on a flat stone. Serrations, recurves and tanto tips each need their own handling, which is where most guides stop and where most pocket knives get ruined. For the tools themselves, see our best knife sharpeners for pocket knives; this page is about technique.
Step 1: find the angle the maker used
Every top-ranking guide gives a single number, and they disagree (10 to 15, 15 to 20, 20) mainly because most of them don't say whether it's per side or the total of both sides. Makers do publish their numbers, and the honest answer is to match whichever one ground your knife:
| Maker | What it publishes | Per side | More detail |
|---|---|---|---|
| Buck | "13-16 degrees per side" | 13–16° | Buck's sharpening guide |
| Benchmade | 30–35° inclusive for most knives | 15–18° | Benchmade sharpening angle |
| Spyderco | Sharpmaker set at 30° or 40° inclusive | 15° or 20° | Spyderco sharpening angle |
| Kershaw | "original sharpened angle of 18°-22°" | 18–22° | Kershaw product care page |
| Victorinox | "15 to 20°" for pocket knives | 15–20° | Victorinox sharpening angle |
A marker settles it for your own knife. Color the bevel, make two light strokes, and see where the ink came off: all of it means you're on the factory angle, only the edge means you're too steep, only the shoulder means you're too flat. Buck teaches the same felt-pen check. Our Sharpie trick guide shows each pattern.
Pocket blades are narrow, which makes the angle hard to see. At 20 degrees, a 15 mm blade lifts its spine only about 5 mm off the stone. The angle calculator works out the spine height for your blade width, and it's the reason a guided tool helps more on a folder than on a chef's knife.
Step 2: set up a folder safely
- Open the blade fully and make sure the lock is engaged. A liner lock that slips closed mid-stroke is how sharpening cuts happen. If the lock is weak, wrap a rubber band around the handle behind the blade or use a clamp system.
- Decide what you're sharpening: the full edge, or the plain section only on a partly serrated knife.
- Put the stone on a damp towel or a rubber base so it can't slide.
- Wet the stone according to its type. Water stones get water (soak or splash as the maker says), oil stones get honing oil, and diamond plates and most ceramics are used dry or with a little water. One popular guide tells you to soak every stone for 10 to 15 minutes; that's only right for soaking water stones.
Step 3: sharpen on a stone
A combination stone does most pocket knives. The Sharp Pebble 1000/6000 is the best-selling one we found (more than 25,000 Amazon ratings) and includes an angle guide; if your knives are hard modern steels, the Smith's DCS4 diamond stone cuts them faster and fits a pack.
- Start on the coarse side only if the edge is chipped, or you can see a bright line of reflected light along it. Otherwise start on the finer side.
- Hold the knife at your angle with the edge facing away from you. Buck's rule is "always cut into the stone": push edge-first, as if slicing a thin layer off the surface.
- Sweep from heel to tip in one stroke, lifting the handle slightly as you reach the belly so the curve stays on the stone. On a short pocket blade this is one smooth motion.
- Do 5 to 10 strokes, then feel the other side by drawing your thumb off the edge, never along it. Keep going on the same side until you feel a slight burr along the whole length, including the tip.
- Turn the knife over and repeat until the burr flips back.
- Move to the fine side and alternate single strokes, lighter each time, to shrink the burr.
- Finish with a few edge-trailing passes on a strop. The BeaverCraft paddle strop comes with compound; a belt works in a pinch.
Our guide to the sharpening burr covers feeling and removing it, and how to strop a knife covers the finish.
Step 3, field version: a guided pocket tool
Away from a bench, a tool with built-in guides holds the angle for you. The Work Sharp Guided Field Sharpener has 220 and 600 diamond plates with 20° and 25° guides, ceramic rods and a leather strop. Brace it on a log or your knee, start on the fine plate, and only drop to the coarse plate if fine doesn't bring the edge back. Our Guided Field Sharpener review walks through it step by step. Work Sharp's newer Folding Field Sharpener trims that to a 400 diamond plate at 20° and a fine ceramic at 25°.
Pull-throughs are faster and less precise. On the Smith's Pocket Pal or the SHARPAL 101N, use the ceramic slot for routine touch-ups and save the carbide slot for a really dull edge: carbide scrapes steel off rather than grinding it, and Smith's says its carbide slot is for straight edges only. Draw the knife through with light pressure, heel to tip, 3 or 4 times.
Step 4: adjust for the blade shape
This is the part the other guides skip. A flat stone only touches an edge that's straight or curving outward. Anything else needs a different contact point.
| Edge | How to sharpen it | Tool that helps |
|---|---|---|
| Plain drop point or clip point | Steps above; lift the handle through the belly | Any stone or guided tool |
| Partly serrated | Plain section on the stone; each scallop with a tapered rod, bevel side only, then a few flat strokes on the back to remove the burr. Kershaw says its serrations are ground on one side only. | Tapered diamond rod (on the Pocket Pal and 101N), or a Sharpmaker |
| Recurve | Belly and tip on the flat stone; the inward curve on a rod or the rounded edge of a stone, working short sections | Spyderco Sharpmaker or a rod |
| Tanto | Two separate edges. Sharpen the long edge, then the short front edge, and stop each stroke at the corner so it stays crisp | Stone or clamp system |
| Small Swiss Army blades | Short strokes with the stone held still; the small pen blade often needs the stone's edge to reach the heel | Pull-through or a small guided clamp |
Spyderco's Sharpmaker instructions say to use the rounded edges of its stones, with a slightly looser grip, so the stone flows into each serration. Buck's warning is the one to remember: a flat stone or steel will grind serrations off. Our serrated knife guide covers scallops in more detail. We didn't find recurve or tanto instructions on the Buck, Kershaw, Spyderco or Benchmade sites, so those rows are standard practice rather than maker quotes.
On a Swiss Army knife, the saw, scissors and screwdriver tips aren't stone jobs. Victorinox's guide covers the blades only, and running the saw over a stone flattens the points of its teeth.
Hard steel takes longer
Plenty of modern folders use wear-resistant steels that barely notice an aluminum oxide stone. If 30 strokes on the coarse side don't raise a burr and your angle check is right, the stone is too soft for the steel. Switch to diamond. The same knife on a 1000 water stone and a diamond plate can take very different times; that's the steel, not your technique. Our whetstone vs diamond stone page explains why.
Check the edge, then clean the knife
Hold a sheet of printer paper by one corner and slice down through it. A sharp edge cuts cleanly from heel to tip; a snag marks a spot to touch up. Then look straight down at the edge under a bright light: a dull or rolled spot reflects a thin line of light. Skip the arm-hair test.
Metal and stone dust works into the pivot and between the liners of a folder. Rinse or brush it out, dry the knife fully, and put a drop of oil on the pivot. Close the blade carefully the first time, since a fresh burr can catch on the handle.
Or send it back to the maker
For an expensive folder, the factory service is worth knowing about. As of October 21, 2026:
- Benchmade LifeSharp is free for the life of the knife, with a $20 fee for packaging and shipping that you avoid by dropping it at the factory store or a participating dealer.
- Spyderco sharpens plain, serrated and combination edges free; you pay $10 return shipping.
- Kershaw offers free lifetime sharpening by mail to Tualatin, Oregon.
- Buck charges $6.95 per knife and doesn't do serrated edges. Its service page and FAQ disagree on whether return shipping is included, so check before you mail it.
Our knife sharpening service cost page compares these with local and mail-in sharpeners.
If the knife you carry most is also the one you dress game with, how to sharpen a hunting knife covers the steeper field edge. If you'd rather clamp the blade, how to use a Lansky sharpener walks through the clamp, which Lansky says holds blades as narrow as a small Swiss Army blade. For a sharpener that fits a pack, see our best portable knife sharpener.
Sources: Buck Knives, How to sharpen your knife and sharpening services; Benchmade, Knife Care 101 and LifeSharp instructions; Spyderco, Tri-Angle Sharpmaker and warranty and repair; Kershaw, product care and blade edges; Victorinox, How to sharpen a pocket knife. All checked October 21, 2026. Product details from Amazon listings the same day. How we research · Affiliate disclosure