Put on the CNC safety goggles.
- ER11 collet × 1
- ER11 nut × 1
- CNC bit × 1
- 14 mm open-end wrench × 1
- 17 mm open-end wrench × 1
- Obliquely insert the ER11 collet into the ER11 nut until it snaps into place.
- Insert the CNC bit into the ER11 collet and keep pushing the bit until its end bottoms against the shell of the ER11 collet.
- Twist the ER11 nut onto the toolhead, and secure the nut with open-end wrenches.
Handle the CNC bits with caution and keep them away from children.