Relife RL-068 Mini Polishing Pen Multi-Speed Electric Drill Engraving Pen Grinding Drilling Cutting with 8 Grinding Heads Features: * Solve the problem of traditional grinding pen shake, no shake rotation at high speed, and a safer grinding chip.  * Long gourd appearance design is more comfortable to hold   * Configure  8 different specifications, suitable for repair chip IC grinding, cutting motherboard, bracket, grinding border, etc * 6 Speed adjustment to meet different operation requirements * USB connection, easier to use * Plug-in clip, update grinding is easier * Stable operation, long-lasting strong power output * Precision pure copper chuck design * High concentricity, stable and firm clamping, can be used for 2.26mm shank grinding head * USB can be connected to a variety of devices * Can be plugged in or connected to an ordinary power bank * Efficient cooling air outlet * Multi-effect heat dissipation system, protect the motor, durable and prolong the service life * Thickened aluminum alloy body, surface sandblasting, and anti-skid technology * The surface sandblasting process, increase the hand feel comfortable, wear-resistant, and non-slip Package includes: 1 x Polishing Pen 1 x USB cable 8 x Grinding Heads