Keyring



The keyring was a sixth bag slot which held a number of keys, most usefully dungeon keys among other keys, with dynamic capacity. Not all keys or items with key in their names were compatible with the keyring.

When a player first acquired a key, they automatically acquired a keyring that held compatible keys. The keyring sized dynamically for the number of keys in possession, up to 32 keys.

Removal
In patch 4.2.0, the keyring was removed, as were many of the keys within it. Keys that still had a purpose were moved to the player's inventory, while those that weren't were deleted. Deleted keys that could be sold to vendors were converted into gold and mailed to the player by The Keymaster:

Keyring UI

 * The keyring appeared as a thin key icon between the leftmost pack and the micro menu. Clicking this revealed a bag similar to a normal container.
 * Right-clicking a key in your bank moved that key into a normal inventory bag slot.
 * The keyring adjusted the number of slots to always accommodate all keys. It expanded until there were 32 total slots filled.

Compatible Dungeon Keys (unlimited use)

 * 1) Workshop Key aka Gnomeregan key
 * 2) The Scarlet Key aka Scarlet Monastery key (also usable in Stratholme to enter the Scarlet Bastion)
 * 3) Prison Cell Key opens Blackrock Depths prison cells
 * 4) Shadowforge Key aka Blackrock Depths key
 * 5) Crescent Key aka Dire Maul key
 * 6) Skeleton Key aka Scholomance key
 * 7) Key to the City ''aka Stratholme key
 * 8) Shadow Labyrinth Key Opens the doors to the Shadow Labyrinth
 * 9) Shattered Halls Key Opens the doors to the Shattered Halls
 * 10) Key to the Arcatraz Opens the doors to the Arcatraz
 * 11) The Master's Key Opens the doors and allows access to Karazhan
 * 12) Reservoir Key Allows access to Heroic Coilfang Reservoir
 * 13) Key of Time Allows access to Heroic Caverns of Time
 * 14) Warpforged Key Allows access to Heroic Tempest Keep
 * 15) Flamewrought Key Allows access to Heroic Hellfire Citadel
 * 16) Auchenai Key Allows access to Heroic Auchindoun
 * 17) The Eye of Haramad Summons Yor from Nexus-Prince Shaffar's Stasis Chamber in Heroic Mana-Tombs
 * 18) Essence-Infused Moonstone Summons Anzu in Heroic Sethekk Halls, Druids Only
 * 19) The Violet Hold Key Violet Hold key
 * 20)  Opens the Normal difficulty version of The Focusing Iris within The Eye of Eternity
 * 21)  Opens the Normal and Heroic difficulty versions of The Focusing Iris within The Eye of Eternity

Compatible World Keys (unlimited use)

 * 1) Key to Searing Gorge Alliance side only, through a quest
 * 2) Jump-a-Tron 4000 Key Turns on the Jump-a-tron 4000.
 * 3) Deathforge Key Allows access to the Deathforge.
 * 4) Icehammer's Harpoon Controller Activates the large Nifflevar harpoon gun.  Alliance side only, through a quest

Compatible Machine Keys (one-time use)

 * 1) Key to Refurbished Shredder Activates shredders in Venture Bay

Blacksmithing Keys (used to unlock doors and chests, one-time use)

 * 1) Silver Skeleton Key
 * 2) Golden Skeleton Key
 * 3) Truesilver Skeleton Key
 * 4) Arcanite Skeleton Key
 * 5) Cobalt Skeleton Key
 * 6) Titanium Skeleton Key

Compatible Loot Keys (still available to all players, one-time use)

 * 1) Captain's Key
 * 2) Relic Coffer Key as of Patch 2.0.1
 * 3) Gordok Shackle Key (Patch 2.0.1?) unique, but can leave dungeon
 * 4) Scarab Coffer Key can leave dungeon
 * 5) Greater Scarab Coffer Key can leave dungeon
 * 6) Coilskar Chest Key  opens chests in Shadowmoon Valley
 * 7) Ethereum Prison Key  opens prisons, or turn in 5 for Ethereum Stasis Chamber Key
 * 8) Bash'ir's Skeleton Key  opens larger prisons
 * 9) Ethereum Stasis Chamber Key received from   opens larger prisons
 * 10) Shaffar's Stasis Chamber Key received from
 * 11) Dark Keeper Key
 * 12) Elders' Square Postbox Key
 * 13) King's Square Postbox Key
 * 14) Market Row Postbox Key

Compatible Quest Keys (used during quest, not available after)

 * 1) Bristlelimb Key Alliance side only through a quest
 * 2) Gatekeeper's Key Horde side only through a quest
 * 3) Benedict's Key
 * 4) Burning Key
 * 5) Cresting Key
 * 6) Thundering Key
 * 7) Sha'naar Key
 * 8) Cho'war's Key
 * 9) Shackle Key (Stranglethorn Vale)
 * 10) Shackle Key (The Hinterlands) Horde side only
 * 11) Cuergo's Key repeatable with Cuergo's Treasure Map
 * 12) Boulderfist Key
 * 13) Lianthe's Key
 * 14) Crystalline Key
 * 15) Veil Skith Prison Key
 * 16) Warmaul Prison Key
 * 17) The Warden's Key
 * 18) The Doctor's Key
 * 19) Panther Cage Key Horde side only through a quest
 * 20) Camp Anger Key
 * 21) Ignition Key
 * 22) Derelict Caravan Chest Key
 * 23) Restored Apprentice's Key
 * 24) Grimtotem Key

Event Dungeon Keys (available and used for access to parts of the dungeon, one-time use)

 * 1) Executioner's Key Opens cage in Zul'Farrak
 * 2) Gordok Courtyard Key (Patch 2.0.1) Only available in Dire Maul, key leaves inventory if player leaves Dire Maul
 * 3) Viewing Room Key Opens door to inner part of Scholomance

Incompatible "Keys" (cannot be placed in the keyring)

 * 1) Grimesilt Outhouse Key Quest Key (note: this key was in the keyring from ver. 2.0.1 and was reverted to a regular item as of Patch 2.1)
 * 2) Drakefire Amulet aka Onyxia 'key'
 * 3) Grim Guzzler Key one time use
 * 4) Goblin Transponder for Gnomeregan (Horde) made into a poor quality item
 * 5) Mallet of Zul'Farrak aka Gahz'rilla summoning 'key' No longer a key
 * 6) Scepter of Celebras aka Maraudon 'key' (more like a portal)  (Patch 2.0.1) No longer a key
 * 7) Seal of Ascension aka UBRS 'key' (Patch 2.0.1)
 * 8) Burning Legion Gate Key Quest Key
 * 9) Fel Cannon Activator Quest Key