Increases AC
Adds +5 to Dexterity (thus, depending on prior Dexterity score, either +2/+3 To Hit with ranged attacks, either +2/+3 to AC, and either +2/+3 to Reflex saving throws)
Adds +2 to AC and adds +1 to Strength (thus, depending on prior Strength score, adding either 0/+1 To Hit in melee and either 0/+1 Damage with melee and thrown weapons)