Rogue · Subtlety · tier 4 · from level 25
Serrated Blades
+127 Rupture
3/3 · level 60 · per cast
Serrated Blades
Rank 3/3
Causes your attacks to ignore 9% of your target's Armor and increases the damage dealt by your Rupture ability by 30%.
Averages, counting crits and misses, for a level 60 Rogue with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.