The Quick Click system is made from strong, durable plastic & is easy to install & remove, as the name suggests. It also comes with an air-relief valve, so that you can control air flow & reduce any vacuuming effect on your tools, stopping them from sticking & swirling on certain surfaces. This adaptor set comes with a connection click ring for your existing & Oslash;32mm (114;") hoses. Connect your power tools & your dust extractors with complete confidence, keeping you safe & working without worry.