NSK Ti-Max X-SG20L Mode D'emploi page 17

CAUTION
After the bur/drill is locked in place, pull and push the bur/drill to make sure the bur/drill is locked.
Depress the push button until it is almost parallel to the head cap.
If removing the bur/drill is difficult, grip the bur/drill with fine pliers while depressing the Push-button, and gently remove the
bur/drill. This situation can be avoided by frequently mounting and removing the bur/drill.
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