The Hilmor Compact Swage Tool Kit, model 1839015, is a high-quality hydraulic swaging tool designed for refrigeration tubing. With sizes ranging from 3/8" to 7/8", this tool is perfect for efficiently and accurately forming pipe fittings in HVAC and refrigeration applications. The Hilmor brand ensures reliability. This compact tool kit is a must-have for professionals in the HVAC and refrigeration industry looking to streamline their tubing work.  It works perfect. Is missing the little green aluminum release lever. But it still releases just fine by pushing on the button with your finger.