With its long, thin and blunt tip, it measures the depth of the pocket around the tooth in order to establish the state of health of the periodontium. The instrument has marks engraved on its head/tip for greater precision and legibility.Laser Markings: mm3-6-9-12 To measure horizontal and vertical pocket depth of multi-rooted teeth in furcation areas. EXPLORER DOUBLE N. 6/3 EXPLORER DOUBLE N. 6/3