1. 4 gears adjustable/Pure copper motor/Ergonomic design/Dust display light source/Add hard and remove glue needle 2. Positive and negative rotation motor with hard probe, high-quality combination for higher productivity 3. Ergonomic design for a more comfortable grip 4. LED dust display lamp, do not let go of every tiny residue 5. One-button start, hard probe, high concentricity, safer use 6. High-torque pure copper motor, four-gear adjustable torque 7. After a long time of use, if there is deformation, it can be corrected and restored
