CALEDONIA, Wis. - Some of the most sought-after handcrafted cowbells in the country are made in a Caledonia garage by the hands of Ulisis Santiago – or "Uli," as he is known to his close friends.

The cowbell, modeled here by Swiss bovine Sophia, is, in many ways, rock and roll's secret weapon. Sometimes, it's just what a song needs to go from good to great. Credit: Photo by Maria Feofilova.

Have you seen the new iPhone application "More Cowbell?" Simply download the free app to add glorious clanking cowbell sounds to any song playing on your iPhone. Simple, clean, and oh-so entertaining.

Ulisis Santiago perspires as he bangs on a steel form gripped by a steel jig with a ball-peen hammer in 90-degree heat. The ear-splitting sound rings obtrusively through the intense heat as Santiago ...