The STRwrench 400Nm smartHEAD unlocks the full flexibility potential of the STRwrench family making it able to measure from 20Nm to 400Nm, to be replaced without switching off or rebooting the controller (hot swap) and be repaired. Its calibration is independent of the STRwrench Controller enabling it to be used with any smartHEAD and any STRwrench Controller. Country of origin is IT. Customs tariff is 85437090