The Cleco Part Number 197179038 LiveWire I-Wrench Interchangeable Open End Head, Torque Capacity (Nm): 350 allows for applications with limited clearance or fixed bolt sizes. The Cleco Part Number 197179038 LiveWire I-Wrench Interchangeable Open End Head, Torque Capacity (Nm): 350 includes a built-in programmable chip for application error-proofing.