ivory Silk Serie Instructions Pour L'utilisation page 44

1) Press the locking button (1) and push the bur (2) in as
far as it will go.
2
2) Check that the bur (2) is held firmly in place.
2
42
Eng
1
3) Press the locking button (1) to release the bur (2).
2
DANGEr!
If you notice any unusual noise, vibration, overheating,
interruption in the flow of cooling liquid, leakage or
changes in the colour of the LED, stop using
1