The Accurate Extreme Knob Kit comes in large and small sizes. The kit includes the knob in either Blue, Red, Black or Silver plus all hardware needed.
Questions for options:
Size: Large or small knob size.
Flat Pin: Choose YES option if this is going to be installed on an old Boss reel or ATD. A different center pin is provided to mount to handle arm. Use this option for arms that are flat where the pin mounts (no keyway).
For SR Reel: Choose YES option if this is going to be installed on an SR-12, SR-20, SR-30 or SR-50. A different screw is provided to mount to handle arm. Does not fit on SR-6.