Brass barrel, knurled grip, no plastic nonsense.
Why Not Just Buy the Cheap One?
Plastic mechanical pencils like the Bic Matic or Pentel P205 have weak tips that snap when dropped. The Rotring 600 is a brass hexagon bar of steel with a fixed lead sleeve. It writes precisely and survives years of abuse.
The Buy-Once Math
A bag of 20 Bics is $10 but each breaks or gets lost quickly. One Rotring 600 at $26 is the last pencil you'll buy. The math is simple: stop buying disposables, start writing like an adult.