Were you looking for Critical Hit Rate?
Equipment or traits with this effect will increase the damage of all Critical Hits by a percentage. This includes Ranged Attacks, Critical Hits inside of Weapon Skills, and those triggered by the effects of abilities such as Sneak Attack or Mighty Strikes.
As of the May 2011 Version Update, The cap from equipment, traits and effects is 100%.
Traits that Enhance this Effect[]
Trait Job Level Effect Dead Aim RNG 50 +?% (Ranged Attacks only) Critical Attack Bonus THF 78 +5% WAR 78 +5% DNC 80 +5% DRK 85 +5% Critical Attack Bonus II THF 84 +8% DNC 90 
+8% WAR 90
+8%
Equipment that Enhances this Effect[]
Weapons[]
Name Level Slot Jobs Effect Cruadin 69 Great Sword PLD/DRK +10% (Campaign) X's Knife 72 Dagger THF/BST +10% 
Ferus Algol 80 Great Sword WAR/DRK +3% Kamome 84 Katana NIN +10% Percept Bow 87 Archery RNG +5% Oneiros Knife 88 Dagger RDM/THF/BRD/RNG/NIN +10%
Head[]
Name Level Jobs Effect Anwig Salade *
75 MNK/THF/BST/RNG/NIN/BLU/COR/PUP/DNC +2% Champion's Galea *
75 WAR/PLD/DRK/DRG/SAM +2% Selenian Cap *
75 WHM/BLM/RDM/BRD/SMN/SCH +2%
Body[]
Name Level Jobs Effect Ginhaku Togi 71 MNK/SAM/PUP +?% Shikkoku Togi 71 MNK/SAM/PUP +?% Shinku Togi 71 MNK/SAM/PUP +?% Loki's Kaftan 79 MNK/THF/RNG/NIN/BLU/COR/DNC +5% Alcide's Harness 87 MNK/THF/BST/RNG/NIN/BLU/COR/PUP/DNC +?%
Hands[]
Name Level Jobs Effect Ginhaku Kote 71 MNK/SAM/PUP +2~3%
Shikkoku Kote 71 MNK/SAM/PUP +2~3%
Shinku Kote 71 MNK/SAM/PUP +2~3%
Legs[]
Name Level Jobs Effect Blitzer Poleyn *
75 WAR/PLD/DRK/DRG/SAM +3% Desultor Tassets *
75 MNK/THF/BST/RNG/NIN/BLU/COR/PUP/DNC +3% Tatsumaki Sitagoromo *
75 WHM/BLM/RDM/BRD/SMN/SCH +3% Lancer's Cuissots +1 83 DRG +5% Lancer's Cuissots +2 83 DRG +10%
Feet[]
Name Level Jobs Effect Ravager's Calligae +2 81 WAR +10%
Neck[]
Name Level Jobs Effect Iga Erimaki 80 NIN +2%
Waist[]
Name Level Jobs Effect Fatality Belt 75 WAR/RDM/THF/PLD/DRK/BST/BRD RNG/SAM/NIN/DRG/BLU/COR/DNC +?% (Latent Effect)
Back[]
Ammo[]
Name Level Jobs Effect Qirmiz Tathlum 83 THF/NIN/DNC +5% Charis Feather 84 DNC +5%
Grips[]
Name Level Jobs Effect Brave Grip 72 All Jobs +3.5%
* Requires you to choose the appropriate augment on item creation.
Status effects that Enhance this Effect[]
Atma[]
Name Effect Atma of the Hero +10% (Minor)
Atma of the Razed Ruins +30% (Superior) Atma of the Sanguine Scythe +30% (Superior)
Related Articles[]
Critical Attack Bonus.
Critical Hit.
Critical Hit Rate.
Critical Hit Damage Cap Testing.