Rags are round brushes that are suitable for cleaning between teeth where the gap is quite large. Ragers are available in different sizes and shapes. It is important to choose the right width to ensure that bristles touch the surfaces properly.
Be careful that the metal core does not damage teeth or gums! A dentist or dental hygienist can help you determine the proper size of the brush.
Teeth ragging: how does it work?
Hold a rager between your thumb and forefinger. Support your jaw with your middle finger so you can steer.
Insert the brush from the outside between your teeth.
Move it straight and then back and forth slightly diagonally.
Repeat for all spaces between molars (possibly teeth).