Rings are cute in general, but rings that serve a purpose like the Pat Kim 'Knock Knock' ring are ever better. If you're a superstitious individual who feels the need to "knock on wood" a lot of the time, then you definitely need this ring.
Made of solid walnut with a brass knocker, the 'Knock Knock' ring is ideal for those knocking moments. Never again will there be a time when you need to "knock on wood" and no wood is to be found. Just look to the Pat Kim 'Knock Knock' ring and it will forever be your saving grace.