The chakra needle is a difficult move to master. You put chakra in to trowing needles but the trick to it is what kind of chakra. Like fire chraka that will burn the inside of your enemy or stone and it wil turn our enemy to stone not right away it will take like a hour to. What ever element you can think of like thunder or ice that is what will happen to your enemy if they hit him/her.
Anyone can use this justsu if they know how but it is more up in the higher ranked ninja. It can only be taught by me