A utility knife which includes a feature for presenting a user with a replacement blade holder containing replacement blades when the separate halves of the knife body, referred to as handle portions, are opened to expose an interior cavity is disc losed. According to an embodiment, the ROM cells of a dead microcontroller ROM which are not occupied by a program code memory cells are occupied by the individual data items of the low-voltage switch. A problem with such antennas is that their impedance is inductive, making them difficult to feed. The polymer is composed of ethylenically unsaturated monomers and has a glass transition temperature below \u221210\xb0 C.