Self-serving I know, but can we have weapons with + Set/Disable trap that aren't hammers? Since Gnolls went, there's a lack of trap gear. I've seen 3-4 hammers with trap skills, but pure rogues can't use them without a feat. Same goes for other classes that cross-class Disable Trap. It's even more weird when Bilby's can give out those. I know that hammers are thematicaly cool, but they're kind of limiting as they aren't useable by the only class with Disable Trap as a class skill.
I think the point of the hammer is for rangers, who get search and set trap, to get a decent disable trap score.
I don't know why Bilby would hand out hammers. Maybe that's a relic from earlier versions of the quest.
I can confirm that Bilby does indeed hand out this hammer as a reward.