Some additional explanation may be warranted:
This mod adds...
new Amber weapons - Battle Axe, Claymore, Dagger, Shortsword, War Axe.
new Madness weapons - Battle Axe, Dagger, Mace, Shortsword, Warhammer.
Durable versions of all of the above, plus of all of the Amber and Madness weapons that are already in vanilla Shivering Isles.
And it also corrects several mistakes with weapon stats that are not fixed anywhere else, including in the Unofficial Patches.
(For those of you who have not played Shivering Isles:
Spoiler New weapon sets, Amber and Madness, are added by SI...but whereas most weapon types like Daedric or Elven come in 9 flavors, there's only 4 types of Amber and Madness weapons added by SI. This mod adds the rest of them. And, since a Perfect Amber/Madness weapon is superior to Daedric, that means this mod gives you access to some of the best weapons around!)