W&H S-11 L G Instructions For Use Manual page 18

Rotary instruments
> Use only rotary instruments which are in perfect condition and pay attention to the direction of rotation
of the rotary instrument. Follow the operating instructions of the manufacturer.
> Insert the rotary instrument only when the handpiece is stationary.
> Never touch the rotary instrument which is still rotating.
> Do not activate the chuck lever of the handpiece during operation. This leads to detachment of the rotary
instrument and/or makes the handpiece hot.
18