Gilder Finder Grid

Each of the 60 square grids is identified using a base two binary numbering system.

The six binary number symbols appear on the bottom grid bars along the horizontal axis.
Zero is represented by a short pillar and one by a longer pillar.
The enlarged section shown is of grid square no. 9 – a long pillar at the extreme right represents decimal 1 and a long pillar fourth from the right represents decimal 8.

Pitch= 250 ; Bar width vertical axis= 40 ;
Hole width, vertical axis= 210 .
Gilder Finder Grids, 3.05mm O.D., 100 mesh