Features and Benefits: * For use with most hand-operated grease guns and equipment * 1/8" NPT * Knurled body and mill flats for easy use, installation and removal For over 90 years, service professionals have looked to Lincoln for lubrication equipment designed to meet the demands of day-to-day shop life. In response to overwhelming requests, Lincoln proudly makes its equipment available to those outside the service industry with our Guardian line of lubrication products. Every Guardian product is engineered to meet the industry’s most exacting standards for reliability and performance.