I have set up dust collection on my scroll saws and used that Loc-Line nozzles to suck the saw dust on the top of the saw. I have tried several things along the way to put something on the end of the nozzle to catch pieces of cut offs as they are sucked up. Nylon panty hose is to fine, and gets clogged with saw dust real fast, sticking wires through the nozzles is hard and doesn't work well either. Today I came up with something I think is going to work just fine. I am replacing the sink and faucet in my little down stairs bathroom. Took the old faucet out and was going to throw it in the trash, then I saw the thingy that the water comes through. It has a screen and some kind of aerator gizmo. I took it apart and inside was this little goody, that fit right into my dust collector nozzle. Even has little clips around that expand our so it will not get sucked into the collector. This is a great find..... for me. It's the black piece in the nozzle.