Of the fuze types available for Tellermines, the T.Mi.Z.43 fuze was notable for featuring an integral anti-handling device as standard: when the fuze is inserted and the pressure plate (or screw cap) is screwed down into place, it shears a weak arming pin inside the fuze with an audible "snap". This action arms the anti-handling device. Thereafter, any attempt to disarm the mine by unscrewing the pressure plate (or screw cap) to remove the fuze will automatically trigger detonation. Since it is impossible to determine which fuze type has been installed, no pressure plate or screw cap should be removed from a Tellermine. The T.Mi.Z.43 fuze may be fitted to the Tellermine 42 and 43 series.