Lot of info on the web, looks like terminal strips are used a lot in
marine wiring. I couldn't find a cross-reference for the Radio Shack
item, but what looks the same at a manufacturer site is rated 20 A per
connection. One manufacturer even makes junction boxes with these
strips built in. They do make for a neat and easily read junction box.
These strips come with a wire protector below the screw shank. If
that's the case with the RS one also then it is a better connection
than a wirenut all around.