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Cubikook CS-T01 3-Stage vs. Longzon 4-Stage Manual Sharpener Side-by-Side Comparison

Cubikook CS-T01 vs. Longzon 4-stage manual sharpener comparison: How they measure up in effectiveness, ease of use, and design.

Cubikook CS-T01 3-Stage vs. Longzon 4-Stage Manual Sharpener: Side-by-Side Comparison


Price at publication
Scissor sharpener
diamond, tungsten carbide, ceramicDiamond, tungsten carbide, ceramic
Grit size
Coarse, Medium, FineCoarse, Medium, Fine
L8.4 x W1.9 x H2.3 inchesL9.3 x W1.8 x H3.1 inches
Suitable for
Quick, casual sharpening on a low budget


Build Quality
Overall Design Scoring

The Cubikook is heavily function-oriented — it skips the bells and whistles and focuses on keeping the device sturdy, stable, and effective to use.

The Longzon looks identical to the Mueller handheld sharpener and has a much better build and design than its affordable price suggests. There’s no shoddy parts or gimmicky details — everything fits together securely and seamlessly to serve its purpose.

We also like the device’s substantial size which allows for easy sharpening of larger kitchen knives. The inclusion of the gloves is nice, though we didn’t feel the need to use them.


Slot Arrangement
Pulling Through
Stability on a Clean Surface
Stability on a Wet and Dirty Surface
Overall Usability Scoring

The Cubikook has a straightforward design with a flat base, a sturdy working section, and an intuitive slot arrangement. Everything supports a safe and easy sharpening experience. It’s the best handheld sharpener for those with weak or shaky hands.

The Longzon is straightforward, and there are visual cues on the device if you’re not sure how to use it at first glance. Its large grip and wide working section make sharpening natural and effortless. Though we think a more modest height would make it safer to use, its stability is well above average.


Sharpening Time to Cut a Lemon
Maximum Sharpness Achieved
Edge Smoothness
Material Retention
Overall Performance Scoring

The Cubikook performed consistently well in all four categories: speed, sharpness, material retention, and edge smoothness. As pull-through sharpeners go, this one is one of the most well-rounded options.

The Longzon 4-stage knife sharpener creates one of the finest edges we’ve seen with a device of this type. Unfortunately, the edge’s functionality doesn’t match up with its aesthetics. It only became keen after more than 3 minutes of sharpening, and a prolonged sharpening time didn’t get it much further on the sharpness scale either.

Overall Scores

Ease of Use
Overall Scoring

Pros & Cons

  • Excellent stability 
  • Affordable price
  • Consistent sharpness
  • Solid and sturdy construction
  • Sleek design
  • Substantial, accommodative size
  • Fine, smooth knife edge
  • Inclusion of protective gloves
  • Slot for scissors
  • Small ceramic rods
  • Flaky brand label
  • Tall base
  • Slow sharpening
  • Ineffective slot layout


The Longzon 4-stage sharpener gave a decent performance in most of our tests, especially when it came to edge material retention and edge sharpness. However, it  was mediocre in the deciding ones, such as sharpness and sharpening time. Other than that, it’s a well-made, sturdy, straightforward piece of equipment.

The Cubikook CS-T01 3-stage sharpener comes with its own flaws, namely a poorly attached brand label and a shoddily-fitted ceramic rods; yet, it found itself among the top in all parameters. With a practical design and strong construction, it offered great stability and was among the safest and easiest to sharpen with.

Behind the Comparison

Headshot of Anh Ngo
Anh NgoReviewer

Anh Ngo is a writer with 9 years experience at different media outlets, covering from public news and events to product testing and analysis. At HealthyKitchen101, she works across different departments, communicating closely with its network of writers, editors, and health, tech, and search engine experts to provide a meaningful and pleasant reading experience for visitors.

Headshot of Lap Vo
Lap VoTest Lead

Lap is Head of the Research, Testing, and Review Team (RTR Team) at HealthyKitchen101.com, where he directs and supervises the testing of kitchen gadgets and appliances.

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