The present invention provides a mutual capacitive multi-touch screen, which includes a guarding pattern and a conductive strip pattern exposed from each other. Also, it is an object to provide a work holder for a through hole examination apparatus that can readily adjust the holder to be parallel at low costs. The apparatus also has a buffer positioned in the path of the free end so that, during the operation, the free end strikes the buffer before coming into contact with the receiving surface. At least one of the first or second infusion members is positionable in the elongated delivery device in a compacted state and deployable from the elongated delivery device with curvature in a deployed state.