How to Sharpen a Knife with a Sharpening Guide Slider
By WÜSTHOF - Official Online Store | Published: 2026-10-22
Category: How-to Guides
Learn how to use the WÜSTHOF Sharpening Guide Slider to maintain a consistent 14-degree angle on your whetstone, making knife sharpening effortless and safe for beginners.
Quick answer
Attach the WÜSTHOF Sharpening Guide Slider to your knife, place the guide on a whetstone, and slide back and forth at the preset 14-degree angle for a consistent, scratch-free edge.
Why use a sharpening guide slider?
Maintaining the correct angle is the hardest part of hand sharpening. The Sharpening Guide Slider locks your knife at a precise 14-degree angle, so you don't have to guess or adjust mid-stroke. This is especially helpful if you are new to whetstones or want to avoid uneven bevels.
The soft silicone surface protects your blade from scratches and gives you a secure grip while sliding. The trade-off is that you lose the freedom to vary the angle for different blade geometries, but for most WÜSTHOF kitchen knives, 14 degrees is the ideal edge.
What you'll need
A WÜSTHOF whetstone (or any flat sharpening stone), the Sharpening Guide Slider, and a damp cloth for cleanup. No additional tools or clamps are required.
Step-by-step instructions
- 1. Attach the slider to your knife: Slide the Sharpening Guide Slider onto the spine of your knife until it fits snugly. The silicone grips the blade without scratching. Make sure the guide is positioned near the heel of the blade for balanced control. Common mistake: attaching the slider too close to the tip can make the knife unstable. Keep it near the handle for better leverage.
- 2. Place the knife on the whetstone: Hold the knife with the slider resting flat on the whetstone. The guide automatically sets the blade at a 14-degree angle. Keep the blade edge facing away from you. Check that the entire edge of the knife makes contact with the stone. If only the tip touches, reposition the slider.
- 3. Slide the knife along the stone: With gentle pressure, push the knife forward along the whetstone in a smooth, sweeping motion from heel to tip. Let the slider guide the angle. Repeat 5–10 strokes per side. Do not press hard. Let the stone do the work. Too much pressure can bend the slider or damage the edge.
- 4. Flip and repeat on the other side: Turn the knife over so the other side of the blade faces the stone. Reattach the slider if needed. Repeat the same sliding motion for the same number of strokes. Common mistake: using uneven strokes on each side. Count strokes to keep the bevel symmetrical.
- 5. Clean and test the edge: Wipe the blade clean with a damp cloth to remove metal filings. Test the sharpness by slicing through a piece of paper or a tomato. If it still feels dull, repeat steps 3–4 with a finer grit stone. A sharp knife should cut cleanly without tearing. If the edge feels rough, move to a finer stone before repeating.
Product used in this guide
- Sharpening Guide 'Slider': The WÜSTHOF Sharpening Guide ensures the proper 14-degree angle while sharpening. The soft silicone surface prevents scratches and helps keep a secure grip on the guide. You get a repeatable, factory-recommended edge without needing to measure angles by eye, and the silicone protects your blade from accidental damage.
Sharpening Guide 'Slider'
