d647950c_d___Game_Guide_and_Walkthrough__BONE_CHARM_PROPERTY
[BONE CHARM NAME] Reinforced Bolts [USEFULNESS] It is a good idea to wear this charm if you like using your crossbow frequently.. [BONE CHARM PROPERTY] 
A lower chance for a bolt to break when it sticks into enemy body.
Bone Charms - list - Collectibles - Dishonored - Game Guide and Walkthrough
BONE CHARM PROPERTY