Mini Electric Engraving Pen, Hollowcup Motor, 42 Bits with Aluminum Case, OLED,
OLED Display ✔ ✔ ✔ ✘. Grinding, polishing, curving, sanding, wood carving,engraving and more light projects, all your need is this convenient all-in-one tool. Engraving bits x 30,polishing bits x 12.