When attaching the 4" Steel Ring Port Receiver to your machinery, you'll be able to quickly connect to any hose that has a MagLink™ Magnetic Connector attached (not included). This type of setup saves you a boat load of time. Steel Ring Port Receivers along with Magnetic Connectors (not included) make the MagLink™ dust collection system perfect for all workshop environments. Keeping our workspace, clutter free and healthy is as important as it ever was.