Triangle Ruler metric

Thanks to the author for the wonderful model. I added 5 cm rulers to the square and countersinks for the bolts, because... I didn’t want the bolt heads to protrude beyond the plane, which allowed me to use the tool to its fullest potential.
To speed up printing, I removed the logo.
part 1 located here https://www.thingiverse.com/thing:6692343/remixes