NSK FX15 Mode D'emploi page 24

2) Insert the wrench firmly into the rear of the handpiece
head until it stops, as shown in Fig. A-1.
3) Tightly hold the FX wrench as illustrated in Fig. B then pull the
drive shaft straight out in the direction of the arrow (Fig. B).
Fig. A-1
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Fig. A-2
Fig. B
CAUTION
• Be sure to insert the FX wrench straight into the
handpiece head. Do not insert the FX wrench at an angle
as shown in Fig. A-2.
• When removing the drive shaft, tightly hold the FX
wrench as directed in Fig. B.