This is an adapter to attach a vacuum to Dewalt orbital sanders. It isn't mounted using Dewalt's system instead it's just a friction fit.
I've designed it for a couple different sizes of vacuum hoses. you will need to measure your vacuum's hose diameter to pick out the right size model.
If none of the models fit your size of hose I included the fusion 360 files with a parametric setting you can change to modify it to the right size. if you don't have fusion 360 if you leave a comment with your vacuum hose size I can add a new sized model.
The design I printed out is the 45mm one.
The author marked this model as their own original creation.