Power Isome are artificial sandworms that are infused with scent to make them extremely attractive to fish. Unlike most "rubber worms" they are biodegradable and also digestible (by fish - I wouldn't suggest snacking on them). They are well known to British rock fishing enthusiasts but to my knowledge they have been unavailable in the US - until now.
Rock fishing is inshore salt water fishing, generally for modest sized fish. Around the Chesapeake Bay, striped bass are called "rock fish," and although I suspect stripers would take the Power Isome pretty readily, that's not what is generally meant by the term rock fishing. I think rock fishing is fishing for the smaller fish that live around the rocks along the shore.
One of the things that sold me on the these baits is that even though they are formulated for salt water fish, I have caught trout, bass and bluegills with them. Cut in half, they'll look an awful lot like a hellgrammite.
There is one other factor that is very nice about the Power Isome compared to something like the Berkley Gulp scented baits. They don't stink! They have a fruity smell that is way better than the truly nasty smell of the competition. Because they have a nice fruity smell, be sure to keep them out of the reach of children. "Not for human consumption" is about the only English on the entire package.
4" long. Package of 20.