Macnaught’s New Grease Control Valve gives precise on/off delivery of your grease pump along with accurate grease measurement. Measure critical grease points with ease and accuracy or log the total grease delivered during a shift, month, year, or whatever time frame you require. The Digital Display can easily switch between Ounce, Milliliter, or Gram units and Totals in Pounds, Liters, or Kilograms. Comes complete with rigid extension and three jaw coupler.Finally, an Industrial Built Grease Pump Control Gun that provides accurate grease measurement!