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It is a combination of a ruler and a pen. It features a mini round measuring wheel that makes measuring a curved line easier to do, and it makes drawing a curved line onto paper with the exact dimensions.
Measuring wheel 2.5inch(6.4cm)/4 inch(10cm)
A triangular shaped barrel is ergonomically comfortable to hold and Hi-Tec-C Cartridges refills.
Neopenx: Innovative Rolling Ruler and Pen Combo
An ergonomic pen allows you to write or/and draw with ease.