Like many others here, I had trouble finding the right nozzle. The photos are an information sheet that came with the wrong app I bought. It seems that DeWalt has tried to clarify the use of many of them; Again, they didn't get it right, but maybe that helps. Overall: The DWV9000 is a twist-lock that only attaches to Dewalt tools that come with a built-in receiver for it. All other attachments in the photo (except one) are attached to the DWV9000 to convert it to a different size to attach to tools that don't have a built-in Dewalt twist lock receiver. The only exception is the DWV9190 (pictured below), which connects a typical 2-1/4" hose end to a Dewalt swivel connector (DWV9000) which then attaches to some or all of these other Dewalt tools. Adapters so hopefully you can attach them to instruments that don't have a DeWalt twist-lock receiver.
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