- Strong gap-free rings keep your papers securely in place
- Features standard 4.25” spacing between the rings
- Includes boosters/triggers to make it easy to open and close
- 20mm base
- 3 Round 1/2 inch Rings
- Color - Black
These black 3 ring binder mechanisms are designed to hold standard-sized 8.5” x 11” sheets. The time tested and durable design ensures years of use at home, school, and in the office. These are great for those who want to create their own custom binder. Fasteners sold separately.