What's your favourite bit of kit in your setup?

Mine has to be my 35' tucker pole. I certainly get my use out of it, and it's not too heavy on the old arms, - certainly paid for itself in the year and a half ive been using it. I also, really love my 900-2000 gpd RO-system system. Some serious bit of Reverse Osmosis kit right there. So just a short and sweet post about you favourite bit of kit in your existing set-up. Feel free to comment and tell us what you like/ and perhaps what's on the wish list.

Cheers!