• 
  Withdraw the cannula cursor until it stops (hooking click) Withdraw the stylet cursor until it stops (hooking click)
• 
  Choose the lenght of the semple to take by moving the proper selector on the longer or the shorter position
• 
  Put the safery catch on LOAD position
• 
  Push the posterior shooting button
• 
  Or arternatively the anterior shooting button
• 
  To estract the needle: withdraw the cannula cursor until it stops (hooking click) in order to uncover the stylet for the frustle taking