The 0334700000, designated as BS 25 bare, is a fixed jumper link accessory for SAKT series disconnect terminals. It is part of the QB jumper family, which works with an internal sliding connection link within the terminal block to open or close a circuit. While the jumper itself remains fixed, the terminal's internal slide makes or breaks contact with it, enabling circuit switching. This component is typically used in applications like current transformer circuits and measurement test sets where reliable disconnection and cross-connection are required.