A rare earth-based core for use in the casting of a reactive metal is described. The tool is adapted at one end to permit the shaft to pick up rotary drive from a hand-held driver unit, and carries a foodstuff-processing head at its other end; the processing head comprising a bladed member, coupled to the shaft and having at least three blades. Using asynchronous parallel data stream processing the USB transceiver concurrently decodes received NRZI encoded data. Each service module attribute is stored in a relational table of the service module data structure, which includes. When the NDEF message is accessed, the NFC tag sets the data in the first register to indicate that the NDEF message has been read.