If you’re a copyeditor, don’t make the mistake of buying Ticonderoga checking pencils. Brittle, breaking, light-marking, hard-to-erase . . . Yuck.
What brand do you like? I can usually only find those or Sanford Col-Erase at the stores, and I’m not wild about Col-Erase either (though they’re a far cry better than the Ticonderoga).