Interestingly, even the file folders that hang from hooks at the top have this scoring. Canonical: https://www.tops-products.com/pendaflexr-surehookr-reinforce

Interestingly, even the file folders that hang from hooks at the top have this scoring. Canonical: https://www.tops-products.com/pendaflexr-surehookr-reinforced-hanging-folders-legal-size-assorted.html https://www.tops-products.com/pendaflexr-surehookr-reinforce... Better photo: https://www.amazon.com/dp/B01MXC0YS5/ https://www.amazon.com/dp/B01MXC0YS5/ (Source: Nerd young child with Pendaflex filing system.)