They have a high wear rate and are way to small to be worth it.
I prefer Staedtler Mars plastic pen or their latex free drafting erasers.
D
Donald S.
Finally Found the Erasers needed
Looked everywhere and finally found the extra large erasers needed for woodpeckers pencil. Worked great. Unfortunately jlpencil got damaged and now I’m trying to find a replacement for pencil. Thanks for selling Proust a reasonable price.