This Billet Knob Installation Tool is used to install the MPCstuff brand Billet knobs and only these knobs.
The size is 0.9mm for the smooth knobs
The size is 1.5MM for the Lined Knobs
Please select above which you need.
These are the knobs here - https://www.mpcstuff.com/billet-silver-anodized-red-knob-for-akai-mpc-mpd-mpk-maschine/ (it is not used for any of our other knobs)