Orion Rc Balance Rod for Dji Self Tightening Propellers (Dji Phantom, Fc40, Phantom 2, Phantom 2 Vision, Vision+) This is a must have for the aerial photography hobbyist or professional to ensure proper balance of your propellers to reduce unwanted vibrations. Perfect for balancing your DJI self tightening propellers using your favorite prop balancer like the Dubro Tru-Spin Prop Balancer (DB499). Polished Aluminum. Made in the USA.