Rage items and stacking

[Llapgoch]

hello. I noticed a very nice amulet for sale in game that has extra rage and extend rage as its properties. Having both of these feats already I wonder if the item is useless or is it made to stack on top of my characters feats. I hope it stacks since most barbarian pcs I imagine will have those feats by the time they could even place on the amulet itself (level 13 requirement) but I would like to confirm it before trying to save up almost 40K. Any input appreciated, thanks.

[mrm3ntalist]

They do not stack with feats you already have. Feats from items dont qualify as prereqs for the next feats eg Extend Rage II

[Llapgoch]

Very good to know! It would have been a huge waste, thank you.