Simple Magnet Tool mount (10mm x 3mm Magnet)

I I have a small woodworking shop/shed and made this to mount for the tool board to hold my small and medium metal rulers. I have my larger ruler help up with 2 of these and it works well. This works well for the smaller rulers and I plan to make a larger version with more magnets for heavy items.

use's a 10mm x 3mm magnet

Thanks