Size: 30mm


  1. The scale on the roller can decide the space of the parallel lines when moving.
  2. To get the perpendicular parallel lines, Insert the pen on hole then moving downward.
  3. Use any hole as the center. Can draw different diameter of circles.
  4. Use the center hole of the protractor as the center. Can draw any kind of angles.
  5. Incorporate with land 2 as described above cross lines or grips.