[2] They are known best for their instrumental melody "Sleep Walk", one of the biggest hits of the golden age of rock 'n' roll, which became a regional success and eventually scored the top of the Billboard pop chart when it was released nationally during 1959.

After hearing a steel guitar on the radio, he wrote to his wife, "I'd like the boys to learn to play this instrument".

This trio appeared at local dances and parties, performing both original compositions and some Hawaiian standards.

With money Santo made from these performances, he bought a Fender steel guitar, one with three necks, each with eight strings.

Their first release, "Sleep Walk", was credited as being composed by the two brothers plus Santo's wife, Ann,[8] although Johnny later said that her name was put on by mistake.

"Sleep Walk" continues to be popular owing to consistent radio airplay as well as its usage for commercials, television programs, and movies.