Handwritten correspondence is somewhat of a lost art anymore, although friendly neighborhood stationery nerds are certainly trying to change that. Anyone who’s just beginning to discover a love of handwriting letters — or doing paper crafts like origami, cardmaking, or bookbinding — may find that folding paper by hand gets tiresome and rarely produces the best results anyway.

A bone folder like this one is designed for this very purpose. It’s a nifty old-school tool for scoring, creasing, and smoothing paper. The name comes from the fact that they were originally made with actual bone (often from a cow or deer), but fear not, animal lovers; this one’s made from melamine plastic.

The folks at Cool Tools reviewed this same bone folder on their YouTube channel, showing a little of how it works:

Get the EK Tools Bone Folder for just $6 on Amazon.