Power Steering Fluid deteriorates over time, resulting in varnish & sludge deposit build-up. Power steering systems are typically neglected & minor problems are often ignored. Signs of maintenance neglect include shuddering or hard steering especially when the fluid is cold. Your customer will feel the difference. Allows both draining & refilling of the power steering system through the power steering fluid reservoir. Replaces up to 95% of the old power steering fluid. Provides an efficient & economical solution to the problem of power steering system fluid service. Portable, lightweight unit is contained in a durable plastic carrying case & operates on 12V DC power (vehicle battery). OEM approved.