P4-SD:
Removal of calculus in shallow pockets

G2-S:
Removal of significant supragingival calculus

G1-S:
Removal of supragingival calculus

E4-S:
Removal of foreign filling material during retreatment 

E3-SD:
Enlargment of the canal walls to remove the broken instrument

E31-S:
Removal of foreign particles from one-third of the canal

E30-S:
Removal of deep foreign particles in canal

E8-SD:
Used for root canal restrogression, efficient root apicla polishing

E7-S:
Removal of broken instrument

E6-SD:
Removal of foreign material in cavity to access canal orifice