Using the Bosch VAC004 is a breeze. First, find the tool with a 2 - 1/2 inch hose port and the 35 mm hose you want to connect. Then, simply attach the VAC004 to the tool's port and slide the 35 mm hose onto the other end of the adapter. Make sure it's a snug fit to prevent any air leaks. When using it, keep an eye on the connection to ensure it stays secure. For maintenance, clean the adapter regularly with a damp cloth. Since it's made of plastic, avoid using harsh chemicals that could damage it. Store it in a dry place when not in use to prevent any warping or cracking. This adapter is compatible with several part numbers and models, so you can use it across different Bosch power tools to expand their functionality.