ExPros 8-CP WHO is a combination instrument that is double-ended, ball-ended and combines Explorer 8 and CP-WHO Probe in one instrument Explorer 8 is used in detection of periodontal pockets that are not deeper than third dental root. It offers high precision to a dentist while working. CP WHO probe is used for assessment, Ball-end probe gives a clearer picture of the gingival pocket depth and increases tactile sensitivity. Ball-ended periodontal probe WHO is immaculately designed to reduce injuries while measuring periodontal pocket depths.