Stiff centre allows for efficient filing without bending or creasing the file.
Multiple grits to suit every need.
High-quality grit paper for a long-lasting file.

Remember to always score the edges of your file before use to avoid cutting you or your clients.

Are they sanitizable/reusable?
Files and buffers by nature are porous, so they cannot properly be disinfected. You can however get multiple uses out of one file if you were to save and identify each clients' file.