Segmental outward projections are provided at radially opposite positions on the circumference of a tubular mount portion of a main body, and truncated side portions are provided between and at the opposite sides of the segmental outward projection. A hinge plate is configured for attachment to the second item and a flap is pivotably attached to the hinge plate and includes a channel defined by a pair of opposite sidewalls. The second gate insulating layer is then removed by etching with a gate electrode formed thereon acting as a mask. The virtual airbrush tool may create the mark using texture projection or by emitting multiple individual paint particles, which may have random sizes and velocity directions. In one embodiment, the user service tickets are refreshed daily and also in response to login attempts if the authentication service is readily accessible.