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KitchenIQ 50009 Manual vs Chef'sChoice 4643 Manual Side-by-Side Comparison

The KitchenIQ 50009 and Chef'sChoice 4643 Manual Sharpener have more in common than their looks suggest. And neither performed well in our tests.

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KitchenIQ 50009

Chef's Choice 4643

Chef'sChoice 4643 Manual vs KitchenIQ 50009 Manual

Overall Verdict

Ranking by
OverallScore Performance50% Design15% Ease of Use35% ScoreOverall 50%Performance 15%Design 35%Ease of Use Chef's Choice 4643KitchenIQ 500096.54.39.38.46.24.38.18.2
Showing: 2/2 Items

The KitchenIQ 50009 and the Chef'sChoice 4643 Manual Sharpener may look completely different, but they achieved very similar ratings across the different tests we put them through.

Both devices have a strong and robust build. The KitchenIQ is a very compact sharpener that’s designed to stay securely on the edge of the countertop, while the Chef’sChoice has a more substantial size and works well on flat surfaces. 

The former sharpens with tungsten carbide and ceramic blades, while the latter depends on diamond sharpening wheels.

And yet they garnered similar performance ratings, as neither went beyond average in our tests. Each took more than 3 minutes in the speed test whereas most others took less than 2 minutes and both are one notch below average in the level of sharpness achieved. Nor did they excel in edge preservation or polishing.

The choice between these two comes down to your personal preference. However, be advised there are better manual sharpeners out there, such as the Cubikook CS-T01 or the PriorityChef 2-stage sharpener.

Pros & Cons

  • Easy storage
  • Affordable price 
  • Base works on both counter edge and flat surfaces 
  • Simple, sturdy design
  • Works with 20° and 15° edges
  • Compatible with serrated blades
  • Grippy handle
  • Neat, ergonomic overall design
  • Awkward small size
  • Long sharpening time
  • Expensive price
  • Awkward slot layout

Key Specs

Stages
2
2
Scissor sharpener
No
No
Abrasives
Tungsten carbide, ceramic
Diamond discs
Grit size
Coarse, Fine
Coarse, Fine
Dimensions
L3.7 x W2.1 x H1.8 inches
L9.3 x W2.0 x H2.8 inches

Where to Buy

Price at publication
$10.67
$51.51

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Analysis and Test Results

Performance

Overall Performance Scoring
4.3
4.3

Sharpening Time to Cut a Lemon

1.0
1.0
Sharpening Time
3 minutes 35 seconds
4 minutes
Cutting Feel
Swift and smooth
Slightly heavy

Material Retention

6.0
7.0
Top view of a bowl containing metal sharpening residue next to the KitchenIQ sharpener
Top view of a bowl containing metal sharpening residue next to the KitchenIQ sharpener
Metal residue on the abrasive slots on the KitchenIQ knife sharpener
A bowl containing metal sharpening residue next to the base of the Chef's Choice AngleSelect sharpener
Sharpening Time
1 minute
1 minute
Target Sharpness

Maximum Sharpness Achieved

6.0
6.0
Sharpening Time
6 minutes
6 minutes
Sharpness Level
7 (ripe tomatoes, 1 swipe)
7 (Ripe tomatoes, 1 swipe)

Edge Smoothness

6.5
5.2
Close up view of the knife blade and edge after sharpening with the KitchenIQ 50009
Close up view of the knife blade and edge after sharpening with the Chef's Choice AngleSelect

Design

Overall Design Scoring
8.1
9.3

In the Box

The KitchenIQ 50009 sharpener on its side next to its package
The Chef’s Choice manual knife sharpener next to its plastic case

Dimensions

The KitchenIQ 50009 handheld sharpener with arrows and figures showing its dimensions
The Chef's Choice 4643 handheld sharpener with arrows and figures showing its dimensions
Length
3.7" (9.4 cm)
9.3" (23.6 cm)
Width
2.0" (5.1 cm)
2.0" (5.1 cm)
Height
1.8" (4.6 cm)
2.8" (7.1 cm)
Weight
2.0 oz (57 g)
6.6 oz (187 g)

Build Quality

8.7
9.0
The KitchenIQ Edge Grip knife sharpener in an open hand
The Chef’s Choice 4643 sharpener disassembled on a cutting board, with a lemon slice
The Chef’s Choice 4643 sharpener disassembled on a cutting board, with a lemon slice
The Chef’s Choice 4643 sharpener disassembled on a cutting board

Working Section

The Kitchen IQ’s working section, with a Coarse slot and a Fine slot
The Kitchen IQ’s working section, with a Coarse slot and a Fine slot
The KitchenIQ’s working section from above
The working section of the Chef's Choice with 3 abrasive slots on a frame and part of its handle and base
Levels of Sharpening
Coarse, Fine
Coarse, Fine
Abrasive
Tungsten carbide blades, ceramic rods
Diamond-coated disks
Mechanism
Pull through
Pull through
Sharpening Angle
20 degrees
15° & 20°

Base

KitchenIQ 50009 Base
The underneath of the Chef's Choice sharpener
The underneath of the Chef's Choice sharpener
One of the feet underneath the Chef's Choice sharpener
Material
Silicone
Synthetic rubber
Feet Type
Edge gripper
Slip-proof sole (x 4)

Grip

6.5
10
The grip of the KitchenIQ edge grip sharpener
A hand holding the Chef’s Choice manual knife sharpener
Material
Silicone
Rubber

Usability

Overall Usability Scoring
8.2
8.4

Slot Arrangement

7.0
7.0
The working section on the KitchenIQ 50009, with one Coarse slot and one Fine slot
The Chef’s Choice 4643 manual knife sharpener viewed from the side

Insertion

7.0
8.5
A knife being sharpened with the KitchenIQ, the sharpener being held in one hand
Close up view of the Chef’s Choice sharpener’s sharpening slots 1, 2, and 3
Close up view of the Chef’s Choice sharpener’s sharpening slots 1, 2, and 3
The working section on the Chef's Choice, with 3 slots featuring diamond-coated abrasive discs

Pulling Through

7.0
8.5
One of the abrasive slots on the Chef’s Choice 4643 with cutting marks on it

Stability on a Clean Surface

10
9.5
Two hands holding and sharpening a knife with the KitchenIQ on a countertop edge
2 hands holding and sharpening a kitchen knife with the Chef's Choice sharpener

Stability on a Wet and Dirty Surface

7.0
7.0
Two hands holding and sharpening a knife with the KitchenIQ on a salt-sprinkled countertop
2 hands holding and sharpening a kitchen knife with the Chef's Choice on a salt-sprinkled countertop

Behind the Comparison

Headshot of Anh Ngo
Anh NgoSenior Editorial Director

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.

Headshot of Nguyen Ntk
Nguyen NtkVisual Specialist

Nguyen Ntk is a graphic designer, photographer, and videographer whose philosophy centers around respecting and celebrating the beauty of reality. Through his lenses, Nguyen strives to capture the true essence of objects and events, showcasing and highlighting authentic features without distortion or exaggeration.

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