Sharpening Station

The Sharpening Station is a furniture item that, when placed and pressed on, applies the Sharpened buff, which increases armor penetration of all melee weapons by  12 /  4.

It can be found in Underground Cabins in the Underground Jungle. On the, it can also be purchased from the Merchant for during Hardmode.

Trivia

 * In real life, sharpening stations, also known as s, are used to sharpen blades.