If you’ve ever struggled to cut a tomato with a dull knife, you know how frustrating it can be. A good knife sharpener isn’t just a nice-to-have — it’s a kitchen essential. The Longzon 4-Stage Manual Knife Sharpener caught my attention because of its promise to sharpen everything from standard kitchen knives to scissors, all in one compact tool. In this review, I’ll walk you through what it’s like to use it, who it’s best for, and how it compares with other options. By the end, you’ll know if this sharpener deserves a spot in your drawer.
Longzon 4-Stage Manual Overview
The Longzon sharpener is a 4-in-1 manual tool designed to work on a wide variety of blades. It’s built with tungsten steel and ceramic materials, giving it the strength to sharpen dull knives and polish blades for a smoother edge. It’s compact, lightweight, and comes with a non-slip base and a cut-resistant glove for added safety.
Who Is This Sharpener For?
This sharpener is best for everyday home cooks, beginners, or anyone who wants a quick and easy way to keep their kitchen knives in shape. It’s not designed for professional chefs or high-end Japanese knives, but for basic steel and utility knives, it does the job well. If you use scissors, pocket knives, or fruit knives often, this sharpener is also a good fit for your needs.
Setup and First Impressions
Unboxing the Longzon was quick and simple. The tool itself is ready to use straight out of the box. It comes with a protective glove, which is a thoughtful touch, especially for beginners. The glove isn’t industrial-grade, but it’s better than nothing for basic protection.
The sharpener feels sturdy in the hand. It weighs about 150 grams (just over 5 ounces) and has rubber pads underneath to keep it from sliding around on the counter. It’s small enough to store easily but large enough to grip comfortably while sharpening.
Sharpening Process
The Longzon sharpener features four stages:
- Scissor Slot – Designed to restore scissors with the proper edge angle.
- Coarse Slot (Tungsten Steel) – Best for repairing damaged or very dull knives.
- Medium Slot (Diamond Rods) – Sharpens the edge after coarse prep.
- Fine Slot (Ceramic) – Polishes and finishes the blade for smooth cutting.
To sharpen a knife, you pull it gently through each stage, following the order above (except the scissor slot, which is separate). For very dull blades, I found that about 15–20 strokes through the coarse and medium stages worked well. For light touch-ups, 3–5 strokes through medium and fine was enough.
One thing to note: you should always pull the knife in one direction — don’t go back and forth. This helps maintain the correct angle and prevents unnecessary wear.
Knife Compatibility and Performance
“Tungsten carbide sharpeners are excellent for restoring dull kitchen knives, especially those made from stainless steel. Ceramic rods are ideal for finishing and polishing the edge.”
The Longzon sharpener works best with basic kitchen knives — think chef’s knives, utility knives, fruit knives, and even scissors. It’s not the ideal tool for high-end Japanese blades or serrated knives (except for the scissor slot), but for everyday use, it’s more than capable.
In my testing, I tried it on an old chef’s knife that struggled to cut chicken cleanly. After 3–4 passes through each stage, the difference was obvious — it sliced through meat and paper much more easily. It won’t give you razor-sharp results like a whetstone or professional service, but for general kitchen prep, it brings dull knives back to life.
Noise, Safety, and Maintenance
Noise-wise, it’s fairly quiet. You’ll hear a scraping sound, especially in the coarse stage, but it’s not jarring or disruptive.
The safety features include a rubberized non-slip base and a protective glove. While the glove isn’t heavy-duty, it’s helpful for cautious users. Cleaning is simple — just wipe it with a damp cloth and don’t rinse it under running water. No oiling or disassembly required.
The materials feel solid, though it’s mostly plastic with inserted sharpening materials. With normal use (a few times per month), it should last for years. There’s no formal warranty info included in the box, but the company offers customer service through Amazon if issues arise.
Comparison With Similar Sharpeners
Here’s how the Longzon stacks up against a few similar models:
| Product Name | Sharpening Stages | Works on Scissors | Safety Glove Included | Ease of Use | Overall Performance |
| Longzon 4-Stage | 4 (incl. scissors) | ✅ | ✅ | Easy | Good for basics |
| Presto EverSharp Electric | 2 | ❌ | ❌ | Very Easy | Very Sharp Edges |
| Chef’sChoice 4643 | 3 | ❌ | ❌ | Moderate | Pro-level Results |
| KitchenIQ Edge Grip | 2 | ❌ | ❌ | Very Easy | Decent for quick fix |
Pros
One of the best things about the Longzon sharpener is how beginner-friendly it is. You don’t need experience or a steady hand — just pull the knife through slowly and consistently. I also appreciate the versatility of sharpening scissors and the added glove for protection. It’s lightweight, stable, and small enough to fit in a drawer. Most importantly, it makes dull knives usable again, even if they’re not razor-sharp.
Cons
However, there are a few downsides to consider. The sharpener doesn’t give the fine edge quality that professionals or knife collectors may want. It also may not handle premium Japanese or ceramic knives very well. While the glove is a nice addition, its quality is average and may not fit larger hands comfortably. Lastly, sharpening takes a bit of patience.Especially if your knife is very dull.
Final Verdict: ★★★★☆ (4.3/5)
If you’re a home cook who wants an easy, low-cost way to keep your knives sharp, the Longzon 4-Stage Manual Sharpener is a great choice. It covers the basics well, handles scissors, and doesn’t take up much space. It’s not a pro tool, but it’s a practical, user-friendly solution for everyday kitchens. I wouldn’t use it on my most expensive blades, but for everything else — it gets the job done.
FAQs
How do I use all four stages on the Longzon knife sharpener?
Start with the scissor slot if needed. For dull knives, begin with the coarse slot, then move to medium and finish with fine. Pull the blade in one direction 3–5 times per stage. Always test the blade between stages for progress.
Does this sharpener work on serrated knives?
Not really. The Longzon sharpener is designed for straight-edged blades. The scissor slot may help slightly on serrated edges, but for full sharpening, use a tool made for serrated knives.
Can I sharpen my pocket or folding knives with it?
Yes, as long as they have a standard straight edge. This sharpener can restore most pocket knives and multitool blades quite effectively.
How often should I sharpen my kitchen knives?
It depends on how often you cook. For regular use, once every 2–4 weeks is usually enough. For heavy use, once a week may be ideal.
Is the glove really necessary?
It’s not required, but it’s a good safety measure — especially for beginners. It can help prevent accidents if your hand slips while sharpening.
If you’ve used this sharpener or have a question, let me know in the comments. Want to explore more knife care tips? Visit Cutting Resource for honest gear reviews and smart buying guides
