The Automotive Blue Coupler/Plug Kit is a handy set that includes 7 pieces of couplers and plugs for automotive air tools. These couplers and plugs allow for quick and easy connections between air hoses and tools, making your automotive work more efficient. They are designed to withstand high pressures and provide a reliable and secure connection. Whether you're a professional mechanic or a DIY enthusiast, this kit is a great addition to your tool collection.