Easy to Carry: The size of the connector is 1/4 inch, ultra-lightweight and easy to hold, and it is convenient to put it out with a tool box or bag. High Quality: The swivel air hose fittings adopt aluminum and has excellent properties such as corrosion resistance, mechanical properties, heat resistance, etc. The product has high impact resistance and durability. Convenient and Practical: This fittings design with 360 degree swivel at 2 locations which help to keep hose from kinking and protect the hose does not twist when working. This adapter has threaded holes in one male and one female pipe, screw on the end of the unit adjusts the tension and prevents leaks. Easy to Use: This connector can be turned 360 degrees and can be replaced anytime and anywhere. And increases maneuverability, reduces hose stress and kinks, extends hose life, and reduces operator fatigue. It's easy to install and can efficiently improve the flexibility between hose and air tool.