Yes, they work to isolate speaker cables from electrostatic charges from carpets. Never used them on interconnects. Do yourself a favor and purchase vintage porcelain insulators - the kind used on electrical power poles - from Ebay (or your local Antique Collectible store) for about $5 apiece instead of the overpriced audiophile version which is esentially the same thing. As to interconnects, I've found cheap foam water pipe insulators from Home Depot - about $3. for a 4'piece - to be effective at separating the interconnects from other cables.
