This is a model for 3D printer owners!
Ever wondered or struggled to get the right donut setting/diameter for your 3D printer to put bolts in?, i've made a bolt test plate, with the ranges M2, M3, M4 and M5, after you printed this you can experiment and test out wich hole fits best for bolts!
See or scroll the gallery images for the diameters!
Watch the making of @ YouTube: https://www.youtube.com/watch?v=OMA1heXIuMY
Sketchup Make 2014
Repetier Host & slicer