Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2291664.

The depth locking part on my aldi router failed so I created this. It's 9mm across the flats.

A deliberately very tight fit, once it's on the bolt it won't come off. pull the bolt into the hole by tightening the screw which goes into the top of the bolt.

FreeCAD file attached too as usual.