General classification of operative instruments: according to their use:
   I. Cutting instruments:
Hand instruments: hatchet, chisels, hoe, excavators , and rotary tools and drills .IV. Finishing and polishing instruments:
Hand: finishing strip , and polishing points
Rotary: finishing burs, mounted brushes, mounted stones, rubber cups, impregnated disks and wheels.VI. Miscellaneous instruments:
Mouth mirrors, explorers, probes, pliers, scissors and others.III.