Cantilever spring/ Finger spring 2m** = 

  1. used for mesiodistal tooth movement. 
  2. Active arm is 12 mm and retentive tag is 3-5mm. 
  3. Placed along long axis of the tooth which has to be moved. 
  4. If tooth is to be moved mesially, direction of helix will be distal
  5. The finger spring is activated by moving the active arm towards the teeth intended to be moved. This is done as close to the coil as possible.
  6. Activation of upto 3 mm is considered 

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