In-game details
[Basic Back Slot Item Driller]Basic Back Slot Item Driller
Bound
Item Shop Item
Tools
Can be used to add one extra rune slot to an item worn in the "back" slot up to a maximum of 1 slot. (After right-clicking the item, click on the "back" slot item to which you want to add the rune slot.)
Cannot be sold in store
Maximum stack100
Middle-click to copy ID