A throwaway insert and a cutting tool enable a high speed cutting operation for a metallic material having great ductility such as aluminum and obtaining a vertical wall with a high quality machined surface while improving chip control. A first member is connected to one of the body and the base and a second member is connected to the other of the body and the base. When the frame is generated, in a downstream signal in which signals of plural transmission speeds are mixed, a dummy signal is set at a place where the transmission speed is changed, and a time necessary to follow a change in level of a received signal due to a change in optical level caused when the transmission speed is changed is secured. A release mechanism is provided to unlock the pliers that is independent of the locking operation. A second dielectric layer is formed on the first RDL, and then a second die is disposed on the second dielectric layer and surrounded by core pastes having through holes thereon. A plurality of head modules are precisely attached to the electrode plate so that nozzle rows formed in nozzle plates of the head modules extend following corresponding windows formed in the electrode plate.