Yes I have both those calls and they are for removing reeds......do not mess with them unless neccasary.or jus check if tight.... I never had any issues until i did remove one then I lost it out of call....messed with other and changed sound....go figure quick lesson don't fix if it aint broke...
Great customer service and they replaced reeds for me !!! Thumbs up Johhny Stewart/Hunter Specialties
Good luck calling