1. Please kindly use ballpoint pen and straight-type ballpoint pen. 2. Please kindly keep the index tabs from heating devices and fire. EASY TO USE: The Inserts Can Be Put Inside The Vertical Slots Of File Tabs, Then Insert The Tabs Into Your Hanging Files. Great For Customizing Your Hanging Folders STURDY HANGING FOLDER TABS: Made Of Durable , Flexible But Not Too Soft, These 2-inch Ganging File Inserts Can Fit Snuggly And Securely In Hanging Folders EASY VIEWING: Each Clear Folder Tab Is Easy To Insert Into The File Folder Slots. Large Enough Tabs So That You Can Easily Read The Label APPLICATIONS: Applied To Files Sorting And Quick Identification Of Hanging Files At Home And In Our Office, Much Easier To Read. They Slide In The Folders Easily And Stay Put