Hydraulic drive system: Unlike manual tools that rely on levers and human strength, this hydraulic copper pipe crimping tool uses a hydraulic cylinder design 360° swiveling head: The swiveling head makes it easier to position the copper pipe in certain locations Anti-slip handle allows for easy use of the crimping pliers when sealing pipes The head is equipped with built-in ball springs, enabling quick replacement of crimping dies of different sizes to meet various needs Balanced center of and a small-angle crimping head make operation more convenient, Manufacturer: STW