- Rotate the E-File Pen twist lock fully to the left until you hear a 'click' to unlock the chuck.
- Insert your chosen Drill Bit, leaving a small gap between the Drill Bit and the chuck so it can rotate smoothly.
- Rotate the twist lock fully to the right to secure it in place.
- Turn on your E-File Pen, using only on Level 1.
For more detailed guidance, view our E-File Pen User Guide or watch our E-File & Drill Bits tutorials on YouTube.









