Bayonet system for extraction system

Bayonet system for extraction system .I drawed this tool to manage the extraction of dust and shavings on my work bench.it allows to connect many tools to the extraction sysytem, I installed it on my work bench and it isd connected to my Multiple selector, other my project available here on Maker wolrd.https://makerworld.com/en/models/467866#profileId-376987there is a part that must to be connect on the flexible hose for vacuum cleaner and the oter part isd to fix on the bench and than on the vacuum cleaner.measures of pipe fitting:internal 29 mmexternal 35 mmto fix on work bench I used 4 pieces of hex nuts and bolts M6have a nice print and a good experience.