In an interview with Janet Deering, I learned that Jens Kruger uses stainless steel frets on his banjo. Usually they are nickel silver. Here is what she said:
The stainless steel frets we put in for Jens are larger frets than what we normally use. He likes the crown to be a bit higher so that he can glide over the strings and just press enough to get the note but not necessarily clamp the string on the fingerboard. It's a different technique than most players use.Here is an interesting interview with Kruger: Some highlights:While stainless steel frets tend to wear out the strings faster, if you play enough to need to change strings often, then the fact that they wear out faster won't be an issue. Many professional players change strings several times a week.