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Encyclopedic overview
A wheel-type cutter
A pizza cutter (also known as a roller blade) is a handheld kitchen utensil that is used to cut various items into sections or slices. Due to its prevalence in the making of pizza, it has earned the name "pizza cutter". The typical pizza cutter has a rotating circular blade that is attached to a handle via an axle. The original design has been modified over the years to include different sizes, blades, handles, and uses. The typical pizza cutter is not limited to cutting pizza but also for a variety of other tasks such as cutting dough or chopping herbs.
Excerpted from Wikipedia’s “pizza cutter” article, available under the CC BY-SA 4.0 licence.