This article is about the device. For the furniture, see Whetstone.
A whetstone is an item created using the Invention skill. Its purpose is the same as the armour stand in a player-owned house, and may be used to repair broken or degraded weapon or armour. Each whetstone may be used once to repair a single item, and is consumed in the process.
The cost for repairing the armour is the same as repairing at an armour stand.