The present disclosure relates to the field of non-destructive testing and more particularly, the present disclosure is in the technical field of tube and pipe inspection. Disclosing a hand-held probe (HHP) for inspecting a tube, comprising: a transducer cylinder having a shape of a cylinder with a near end and a far end and comprises one or more rings of transducers (TRs), wherein each TR comprises two or more mechanical wave transducers where the diameter of the transducer cylinder is less than the internal diameter of the tube; and a housing having an opening for receiving a near end of the transducer cylinder, the end opposite from the tube end that is inserted into the tube. The transducer cylinder comprises an adjustable centering mechanism (ACM) that is configured to join substantially a central axis of the transducer cylinder with a central axis of the inspected tube when the transducer cylinder is inside one end of the inspected tube.
