Braun Toothbrush head drill adapter

Make use of old Braun Toothbrush heads... cut away the neck etc... and stick it in this drill adapter, not overly pretty (should have printed it 0.1 rather than the pics of 0.2. but will allow you to use it as a mini brush in your drill. (did this to clean the head-lining of a vehicle, but can be used for all types of things).
.stl and .123dx files attached - feel free to make more of it.