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-With an ergonomic grip, operate freehand brushwork easier with wrist strength.
-Any brand’s needled blades available.
-Crossing needle lock, more stable to handle.
1、Choose the suitable needle
2、Hold the manual pen. On another hand, use two fingers to unscrew the pen tip
3、Insert the needle into needle slot. Adjust the length of the needle depends on your needs
4、Screw on the pen tip after putting it back into tip
5 、 As photo shown below