Longer / Longer

"Longer"is a highly interesting kind of ruler without any graduation. All measurements taken will be displayed on the ruler and they will be continuously updated according to the current length. To take measurements you slide along the ruler with your fingers according to the length.
In case the length of the ruler is insufficient, it is possible to extend its front part. This way errors occurring while moving the ruler are prevented and a high accuracy is kept.
Lastly, this ruler also includes a function which shows you the points that are forming a golden section.