Shelf bracket - French Cleat Mount Multiple Sizes

This is a clear modern Shelf bracket with a french cleat mounting system provides a strong mount and hides the mounting screws. Updated 01/08/2025: Added a PS1 Print Profile that includes sizes from 3 1/2 “ to 9”. These are in imperial measurements since that's how the boards at Home Depot and Lowes are labeled here in the US. I can do one in Metric units if there's enough interest and someone tells me  what common sizes should be.  I printed and tested every size in this file