Rolling Ruler

A Rolling Ruler helps you make parallel lines easily. I built this one to make Calligraphy guidelines.

The axle can be hot glued to the scale body as shown in the picture

This is a homemade version of a standard rolling ruler you can buy in the store. I have just eyeballed the design. So you can scale it as you need for now. If there is more interest in this I will publish more standard versions