Using this Makita quick coupler is easy. First, make sure your Makita AC310H high - pressure compressor is turned off. Then, connect the 1/4' female quick coupler to the compressor outlet. After that, you can attach hoses with either 1/4' automotive or industrial fittings. When using, keep an eye on the connection to ensure there are no leaks. As for maintenance, clean the coupler regularly with a dry cloth. Avoid using harsh chemicals that might damage the high - quality materials. Store it in a dry place when not in use to prevent rust and extend its life.