I actually use these other than intended for in that I have them on the end of my method feeder which neatly tucks the swivel and rig clip nicely inside protecting and also keeping from getting tangled with the rig. I have MUCH less tangles since doing this. highly recommend.

Works great in keeping your helicopter rigs working properly and not becoming tangled. Helps also in providing a bit of a bumper if your hook link swivel bangs into your bottom bead and runs down the leader when fighting a fish. Also does well in covering your quick link. I use these with all my helicopter rigs.