This Concord 12-Part Jan-Dec Classic Index Divider is ideal for use in lever arch files and ring binders. Sized to A4 and hole punched, they fit most ring binders and offer you an easy way to archive and index your files and documents. Its printed with a monthly January-December indexing system that makes it easy to organise files by month. Transparent Mylar reinforced tabs and punched holes help ensure long-lasting, tear-resistant durability.