Old 3,5" HDD
Controller board from the hard disk itself.
Reverse rotation switch.
HDD original four plates with 600, 800, 1000 and 2000 grit sandpaper, changeable and sandpaper replaceable when needed.
Runs on external 12Vdc 3A power supply.
Birch plywood box with Vieux-chêne and Shellac finish.
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