Repeatedly use our durable metal prongs with your medical charts and office files without worry of breaking of prongs or coming detached from the folderPerfect for storing over 100 files or larger bulky files with our sturdy 4 section classification folder with thick 25pt Green pressboard 17pt kraft paper dividers and strong 2 Tyvek expansionQuickly and easily organizing your standard letter size client files medical patient files or office filesEasily rely on these folders for years with over 100 sheets of paper due to our uniquely thick spine material made of 2 Tyvek expansions