1Fluency Writing: Unlimited writing pencil is easy to erase, writes smoothly, does not easily stain hands, and lasts long. 2Wide Pen Clip: Reusable pencils are made with a wide metal pen clip that holds books securely and does not easily fall out, with a simple and stylish design. 3Pencil Marks: The metal molecules on the pencil tip rub and oxidize against the paper, leaving marks similar to those of a pencil. 4With Eraser: Everlasting pencil comes with an eraser inside the pen, which is convenient and can easily erase writing marks. 5Easy Disassembly: Infinite pencil parts can be disassembled for easy replacement and storage after writing and use.