Fine Bone Handle

From the Composite Bow Upgrade quest introduced in the Come What Follows event.

Dialogue
Yuan Hanzu Ancient Bone. Yuan Hanzu tells you, "Yes, these bones make good handles." Master Hanzu deftly carves the Ancient Bone into a Fine Handle. Yuan Hanzu tells you, "Here you are. This can be used on the finest crafted Composite Bow and Composite Crossbow to increase their effectiveness." Yuan Hanzu gives you Fine Bone Handle. Yuan Hanzu tells you, "I wouldn't use that to upgrade your bow or crossbow unless you are sure you can handle a more powerful weapon. It may prove to be more than you can wield. If you decide you would rather have a different reward I can pass along a little experience I've learned in hunting."