Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Boulderbuckle Strap Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Boulderbuckle Strap suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Boulderbuckle Strap is part of the transmog set Armor of the Skyfather's Chosen (Hunter, Shaman and Evoker only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 134481 (134476 to 134487) were usually added in the same batch as Boulderbuckle Strap: the same quest line, zone, vendor or reward set.