The 21st Century Ruler Scale

8cebbc86d90afa78d306feb8bb05c336 The 21st Century Ruler Scale
‘constrained ball’

‘constrained ball’ is a drawing aid created by korean product designer giha woo.
once attached to the pen, this device helps to draw straight lines without using a ruler.
normally, a ball point pen rolls freely in accordance with the ball located at the tip of
the pen. however, this writing tool prevents winding lines by helping to move
the ball in one direction only. using the installed measuring wheel indicated on the
product, users can draw the exact desired line length in both a horizontal and vertical
direction, as well as strokes in 45 degree angles.

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b13a9282aa3c316ca1401a86d6988006 The 21st Century Ruler Scale
the mounting area is made with a flexible rubber material helping it adhere to the attached pen.

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4bb3784f34414482592aa43fb6f7db1f The 21st Century Ruler Scale
measurement of line is indicated on the product

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3678296c2e557fc27d6f55d8c9ea6d98 The 21st Century Ruler Scale

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