Handles are an optional asset that can be used to determine the bone where a prop is attached to, and it's precise position and rotation.
The Handles asset has a list that checks its Conditions from top to bottom. These conditions can determine which location of the handle should be the most optimal.
Handles for Humans and Beasts
For example, you could have a condition that checks if
Self is a humanoid character or not. If it is, the prop could be attached to the right hand (like a sword). Otherwise the prop would be attached on the beast's mouth.
Handles also help re-use the same position and rotation for multiple weapons, which comes in handy if a game has lots of props to equip, such as swords, shields, daggers, etc...