I'm not sure what this hose adapter would be used for but definitely not to connect a DeWalt sander to a standard vacuum hose. I was expecting to connect in my first image, but this item does not connect to any of the devices in my image. This item connects to the same end of the DeWalt DWV9000 universal connector as the grinder (see my second picture). The other end of this item is the same diameter as my 2 1/4" vacuum hose. So it doesn't work for me either.
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