This mechanical pencil is different from other ordinary mechanical pencils. Because this pencil can sharpen itself. Inside this mechanical pencil, there is a spring whose function is to rotate the contents of the pencil when it is being used to write. So that the contents of the pencil will be tapered and produce consistent lines. You don’t need to rotate the pencil when you want to use the sharp side, because the contents of the pencil rotate themselves. A spring-loaded clutch rotates the pencil content gradually each time you lift the pencil off the paper.
Black, Blue, Pink, Green
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