Mini angle finder square

The operation of the RUBI diagonal marker is very simple.

To begin with, at least 3 of the perimeter tiles must have been placed on the diagonal to be marked. By placing the triangular part of the marker in the corner formed by the tiles already installed, with the template we must look for the exact point of the diagonal, subsequently tightening the screw and locking the position found.

Then transpose this measurement to a new tile, placing the triangular part in the same corner where you...