Sonnax Industries' Power Train Savers are drivetrain protection devices that offer dependable protection against over-torque damage. Once installed in a driveshaft, the drivetrain is protected from over-torque damage caused by any number of factors that can ruin differentials, gears, axles and driveshafts. Power Train Savers feature patented Torque Fuses that shear if harmful over-torque occurs. Each set of Torque Fuses are engineered and calibrated to shear just prior to the powertrain breaking point. Once this occurs, the driveshaft remains in place - supported by an internal system. Collateral damage caused by a broken driveshaft is avoided, along with costly repairs to drivetrain components. To fix the drivetrain, simply replace the Torque Fuses and the vehicle is back in operation.