HIGH QUALITY - This 1/4 inch NPT threaded quick connect air coupler plug kit is the best choice for superior quality. Each male air coupler is made of iron on the inside and solid brass on the outside. This makes them suitable for long-term use. Stronger Connection - This male air coupler provides longer life and a stronger connection. It has 4 ball bearings and a wide hexagonal area and is compatible with I/M/D air plugs. MULTIFUNCTIONAL TOOLS - The most surprising thing about our air compressor accessory fitting brass finish is its versatility. It's useful in auto stores and professional workplaces. It can also be used at home in the garage for air compressors, blow guns, air hoses, pressure washers, air nailers and air tools. Buy with confidence and easily switch quickly between different air tools and accessories during application. PRODUCT SIZE - Our 10-piece male air coupler is made of high quality materials with a professional design. Each male air coupler measures 1/4-inch NPT male threads x 1/4-inch body size and has a maximum working pressure of 300 psi. Interchangeable with most manufacturers, the tool locks easily onto the air hose. Knurled Sleeve Design - Our male air coupler kits are easy to install and quick to disconnect. Experts craft each air coupler with passion to ensure it meets your needs. It features a unique classic knurled sleeve design that provides better grip when connecting and disconnecting. The sleeve helps minimize the risk of accidental disconnection and protects the coupler sleeve.