Air Do X is a complete package for Jewelry makers and designers. It is ideal for Stone Setting, Engraving, Drilling, Polishing, buffing, lapping, etc. thanks for 2 in 1 technology of engraver plus micro motor. The system comes with powerful engraving strokes that starts from 240 SPM and high precision micro motor speed up to 35000 RPM. The speed of the system can be controlled automatically by control knob or foot control.