| 4 ring / 8 cross over prongs | 
| 55 mm spine | 
| Covers and mechanism are riveted to spine for strength | 
| Extra wide covers to take A4 size punched pockets and extra wide dividers | 
| Holds up to 400 sheets | 
| Moistiure and dirt resistant | 
| Unique locking mechanism, easy to open, easy to turn and easy to add | 
| User friendly grips make it simple to remove from even a full shelf |