Tombow MONO Graph Shaker Mechanical Pencil TriColour Barrel 0.5mm
Mechanical pencil featuring twist type "MONO Eraser" attached at the top.
The "shake mechanism," which advances the lead by shaking the pencil back and forth, and the "shake lock" enabled by pushing the clip upwards,
to prevent unintentional lead advance when stored, Tombow guarantee of high-precision writing and erasability.