There’s three ring-binding, spiral-binding and ROLLABINDING. Our disc-binding system combines the flexibility of three ring-binding and the convenience and support of spiral-binding, with a very unique style that is both sleek and practical. Our binding discs or Rollabinders come in all colors and sizes, giving you endless possibilities to customize your bound presentations, reports, school work, college work, or your arts and crafts projects. Our discs are made of ABS high density plastic, and come in 22 different colors. Our metallic discs have a metallized finish.