You can buy these with a calibration certificate for like $70, but I skipped the cert. Should be the same quality, cost me $16. I chose the version with the superior units of measurement.
You can buy these with a calibration certificate for like $70, but I skipped the cert. Should be the same quality, cost me $16. I chose the version with the superior units of measurement.
Yeah… I use 0.9mm lead in my drafting pencil. I tried 0.3mm once but it breaks if you breathe on it too hard.