A metal roller pen is a popular writing instrument that uses a small, rotating ball at the tip to transfer ink from the pen to the paper. Our best rollerball pen generally offers smoother writing with less ink flow interruption than traditional ballpoint pens. They typically use water-based or gel ink, which provides vibrant colours and a smoother writing experience. Roller pens come in various designs to suit different writing needs. Szu Mao is a professional roller pen supplier and manufacturer in China, with more than 44 years of manufacturing experience, welcome to contact us!