Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Medium Armor Kit

NPC Level Zone Chance

Olaf Elite 40 Uldaman 25.0%
Quest Level Side

The Lost Tools 16 Both

Report to Hadrec 16 Both
Source How Reagents

Medium Armor Kit Leatherworking (75) Medium Leather ×4Coarse Thread

Quest	Level	Side
The Lost Tools	16	Both
Report to Hadrec	16	Both