A hinged ruling for pen easy cleaning. Ruling pens are useful in drawing with ink.
An oval nib ruling pen for easy cleaning. Ruling pens are useful in drawing with ink.
The ruling pen with spring blade for easy cleaning. Ruling pens are useful in drawing with ink.
A ruling pen with clamp for easy cleaning. Ruling pens are useful in drawing with ink.
A ruling pen with hook for easy cleaning. Ruling pens are useful in drawing with ink.