From Runes of Magic Wiki
Carpentry requires a lot of patience and concentration! You can find the "Carpentry" skill in the "Normal" tab on the "Skill" interface. In the Carpentry production interface list on the left side of the interface. Then, in the lower right part of the interface, select the quantity to be produced. If you have enough materials in your backpack, press "Craft" to begin work! However, you need to be near Carpentry Tools to do this.
Carpentry recipes for level 11 and above will require the use of 1 Link Rune.