Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Mardum Chain Gloves Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Mardum Chain Gloves suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Mardum Chain Gloves is part of the transmog set Darkwatcher Bindings (Hunter, Shaman and Evoker only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 134385 (134379 to 134390) were usually added in the same batch as Mardum Chain Gloves: the same quest line, zone, vendor or reward set.