Kluson® Replacement Button Set For Revolution Series Tuning MachinesThis Kluson® replacement button set for Revloution Series tuning machines is available the popular keystone shape common for 3 per side applications, these keystone buttons can also be used for our 6 in line tuning machines. The small oval button shape for 6 in line tuning machines is availbale as well and will also fit in a 3 per side format. Includes mounting screws and a set of 6 buttons.