Step 1: From crown to middle.

- Select 1S/#70 or 2S/#50 depending on the root canal.
- Attach the file on the top of Gutta Percha and rotate softly.
- 1st groove catching the GP and file goes into the deep naturally.
- Pause the file 1-2 seconds at around the middle of the canal before the curve.
- Move the file in pull stroke motion and remove the debris.
- Step 1 finish.

STEP 2 : From the middle to the apical 1-2mm.

- Select 3N/#40 or 4N/#30. (depend on the shape of root canal)
- Set a rubber stopper length of 1- 2mm upto the apex.
- Pause the file 1-2 seconds at around the middle 1-2mm short from the apex.
- Move the file in pull-stroke motion and remove the debris