P1: The tip is thin and used to remove subgingival calculus and to clean the periodontal area
P3: The tip is bent left for subgingival scaling
P4: used to remove stones from the shallow periodontal pocket and clean the shallow periodontal pocket
P3D: diamond coated 40 μm, used for the root surface leveling after the periodontal flap operation, also for the edge leveling of the restoration and the expansion of the teeth root bifurcation