THE HOLLOW MADE WITH DIAMOND CROWNS ARE USED WHEN IT DESIRED CIRCULAR PENETRATION TO BE ACHIEVED WITH PRECISE DIMENSIONS.
MAKING HOLES AT DIFFERENT ANGLES AND IN DIFFERENT DIFFICULT POSITIONS.
LOWER NOISE.
CUTS IN CLEANLINESS.
AVOIDING VIBRATIONS AND CRACKS.
AVOID DUST IN THE WORK AREA.
GREAT DIMENSIONAL AND POSITIONAL ACCURACY.
HIGH SPEED OF EXECUTION.