This set of 4 replacement pencil tips and a case makes portability easy when the tips wear out. The 2nd generation pencil has 2 black and 2 white tips that can be easily screwed on. There is no difference in lace material other than its color. The 4 gray tips are pencil tip projectors only and not for actual screen use. These nibs are interoperable for writing and drawing with pressure sensitivity and shading. Right now the tip wear characteristics are better than other tips that wear out too quickly, especially on paper coated meshes. Paper screen covers that feel like paper fiber are like an abrasive, as the extra friction from bumps and ridges wears down pencil tips much faster than a smooth glass screen. But they are durable and last much longer.
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