Rotring 600 Mechanical Pencil, HB 0.7 mm

The 800 model is beter.

Excellent pencils, although if you're anything like me, you'll bend the fine metal tip in no time. Bending them back to repair them is borderline impossible. That's why the rotring 800 is so nice with its retractable tip. But, it costs over twice as much... So maybe it'd be better to get two 600s and plan to break one!