I was working on one of my bikes and found it irritating i couldnt really tell the difference between M3 and M4 when i had to grab a nut from the other room. so i cuickly modelled this up, so ik can just quickly measure without having to grap my caliper and read it. i dicided to post this as i tought someone might find this a usefull tool aswell. i hope you like it :)