A slender, rod-like, hand-held manual surgical instrument made of flexible metal, typically with a blunt bulbous tip that is bent at a right angle to the shaft, that is used for exploring the mastoid process (the large projection of the temporal bone of the skull found immediately behind each ear) during ear/nose/throat (ENT) surgery. It is used to probe the cavities of the mastoid, in particular, the mastoid antrum which communicates with the middle ear. This is a reusable device.