Banjo parts - Fret holders Kyser 3 different types Lot G

Description

This is a lot of Banjo parts - I'm not sure but maybe they are Fret holders of some kind? The black one is empressed Kyser and the silver/black with a G says 7th. They seem to be 3 different types of the same thing. Something to go along the fret board to hold a note?
These came from my Dad's collection - he was the banjo picker and he loved to tinker with projects. IF you win more than one lot, please don't pay until you request an updated invoice so that I can combine shipping costs for you. Good luck