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

The Cubikook CS-T01 and the Mueller 4-stage manual sharpeners are both decent sharpeners, but one is friendlier to the knife edge.

Cubikook CS-T01 3-Stage vs. Mueller 4-Stage Manual Sharpener: How They Measure Up


Price at publication
Scissor sharpener
Diamond, tungsten carbide, ceramicdiamond, tungsten carbide, ceramic
Grit size
Coarse, Medium, FineCoarse, Medium, Fine
L9.3 x W1.8 x H3.1 inchesL8.4 x W1.9 x H2.3 inches


Build Quality
Overall Design Scoring

Despite its affordable price, the Muller 4-stage sharpener has a strong, solid build, substantial abrasives, and tightly-fitting parts. It has a nice fit and finish and a spacious grip that’s comfortable to the touch. However, a lower working section would offer better control and stability.

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


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

Though the Mueller is a bit tall, it offers decent balance and stability. Its large size and substantial abrasives give you a lot of confidence when sharpening. The slot layout could be improved, in our opinion, but it doesn’t pose much of a problem in terms of usability.

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.


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

It won’t make your knife razor-sharp, but the Mueller takes little time getting a dull edge ready for common cutting tasks in the kitchen. Contrary to its twin, the Longzon, however, it eats away the blade and leaves a rough, uneven edge.

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.

Overall Scores

Ease of Use
Overall Scoring

Pros & Cons

  • Strong construction, pretty coloring
  • Quick sharpening
  • Scissor slot
  • Ease of use
  • Excellent stability 
  • Affordable price
  • Consistent sharpness
  • Solid and sturdy construction
  • High center of gravity
  • Harsh on the knife edge
  • Small ceramic rods
  • Flaky brand label


The Cubikook isn’t as fast as the Mueller; however, it’s the better choice if you’re  about more than just speed.

We like the Mueller’s sizable and ergonomic grip and appreciate the handy scissor slot. The Cubikook sports a more pragmatic design, with a wide base and low center of gravity that ensure stability and safety.

The two sharpeners maxed at the same level of keenness—Level 8, which is the highest achieved by a pull-through sharpener to date. The Cubikook was outspeeded to the tune of 15 seconds by the Mueller in the lemon-cutting test. On the other hand, the former was friendlier to the knife, peeling off much less material and doing a better job of polishing the edge.

If you care about the longevity of your knives, the Cubikook’s gentle sharpening approach works much better.

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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