Dubro Products 6mm Drone Quadcopter Prop Balancer For balancing 6MM Drone/Quadcopter Props Most precise balancer on the market with specially designed balancing shaft with left and right hand threads Balancing shaft is made of CNC machined aircraft aluminum for a precision balance Aluminum wheels turn virtually friction free for superior accuracy Works with these drones and more: DJI Phantom, DJI Phantom 4, Blade Chroma, Hubsan X4 Pro, 3DR Solo, Splash