These drill stoppers come as a paired collet and a nut.
They are simply screwed onto the drill bit to the desired drill depth.
This is a set for bigger diameters:
mm
Ø6.5
Ø7
Ø7.5
Ø8
Ø8.5
Ø9
Ø9.5
Ø10
Ø10.5
Ø11
Ø12
Ø12.5
Ø13
PETG with a layer height of 0.15 mm is recommended.
Update 20231210:
Added the diameter on each collet (v16).
The additional box has also been updated with diameters and plugs for better storage (here).
For smaller diameters, check out this design:
https://www.printables.com/model/279168-drill-stopper
The author marked this model as their own original creation.