Start Controller - a Shape (Null by default) which can be used to control the top of the Shape.
End Controller - a Shape (Null by default) which can be used to control the bottom of the Shape
Joint Position - determine the percentage along the Shape for the position of the joint.
Length - the length of your limb.
Taper Graph - create a taper along the length of your Shape (geometry only). See Common Attributes.
Flip - flip the joint to bend the other way.
Stretch - when the distance between the controllers is bigger than the original Shape, stretch the Shape to fit the distance.
Curvature - set the bezier handle length for the joint. 0% is a linear joint, 100% sets the handle length to maximum.
Rotation - when using the commands to create a Rubber Hose rotation is automatically connected to End Rotation Nulls.