Inspired by “Pop-A-Point” rainbow pen & mechanical pencil, we found a smart way to collect and swap bits more easily & flexibly. With similar methods of replacing refills, you simply insert and interchange required bits into the pen, which all are compactly organized inside so that you’ll never have to worry about losing any of them at all! Each pen comes with 6 bits, and each bit is layered over the next in tailor made hexagon barrel.