Avery 16183 Write & Erase Big Tab Plastic Dividers, 5-Tab w/Corner Lock & Exp Pocket, Letter Durable plastic allows for frequent reference. Stylishly shaped Big Tab Dividers are larger, providing 50% more writing space than standard tabs. Customize tabs using a ballpoint pen or pencil. To reuse, just erase and write again. Use the Corner Lock With Expandable Pocket or slash pockets for storage.