Easily pick up15° / 1.07 Office

When we use plastic set squares and rulers,their smooth surface are the contributing factor when they get clung together with the tables and papers.Which cause us a huge headache when separating the set square and ruler from the tables and papers.This is when having a chamfer angle at the edge of the comes in handy.
After conducting several experiments,we found out that a fifteen chamber angle is the most appropriate angle as shown in the diagram.