Spyderco *Factory Second* 400F1S Ceramic File Square.

A note from Spyderco:

This product is being sold as a Factory Second. If a knife or other product doesn’t meet our stringent quality-control standards, it is declared a Factory Second and removed from our first-quality inventory.

Typically, products are declared seconds because they have some kind of minor cosmetic flaw or because they do not satisfy a non-critical quality-control standard. While these flaws may affect the product’s appearance, they do not compromise its proper mechanical operation.