The Wooster Dust Eater is a large triangular cleaning head that attaches to a Sherlock GT extension pole. Wipe it over dusty walls and ceilings and the sticky “mop” picks up the dust.
I wrote up a couple of posts about it on the blog. It is a good bit of kit, especially if you like to denib walls between coats. A tack rag on speed!
(The dust on the floor was for demonstration purposes!)