Upgrade your mobile and electronics repair toolkit with the Mijing DM-12 Coaxial Polishing Pen – a compact, wireless electric grinding and polishing tool designed for precision work on phone motherboards, PCBs, and more.

This lightweight (approx. 71g) coaxial polishing pen features a pure copper motor with concentric design for low vibration and high accuracy. It offers multi-gear torque control (typically 4-speed switching) plus forward and reverse rotation, giving you precise control for delicate tasks. Powered by a large-capacity rechargeable battery with convenient Type-C fast charging, it works completely wirelessly for unrestricted movement.

Key Features:

•  7 interchangeable grinding heads included for versatile applications

•  Coaxial concentric design for smooth, stable operation and quick bit changes

•  Multi-speed torque adjustment + forward/reverse rotation

•  Ergonomic grip for comfortable, fatigue-free use during long sessions

•  Lightweight and portable (approx. 177 × 43 × 33 mm)

•  Suitable for professional phone repair shops, electronics technicians, and hobbyists

Ideal For:

•  IC chip grinding and polishing

•  PCB / board layer polishing and dust removal

•  Shield cover cutting

•  Jade carving and other precision micro-work

Package Includes:

1 × Mijing DM-12 Coaxial Polishing Pen

7 × Grinding Heads

Whether you’re performing motherboard repairs, removing oxidation, or cutting metal shields, the Mijing DM-12 delivers the precision and convenience modern technicians need. A reliable, affordable essential for any serious phone or electronics repair bench.