Feature:1. It is made of hardened material and balances various sizes and weights of air props, marine props, trimmers, wheels, helicopter rotor heads, jet fans, flywheels, etc.2. Safely center and lock the props on the balancing shaft for maximum accuracy.3. Each balancer is equipped with easytooperate accessoriesfollow assembly and support balancing instructions.4. Full adjustable pitch propeller balancer.5. Precision machining of rotating wheels to ensures perfect balancing is easy.6. Unique upper or lower settings can accommodate options and even large props.7. Dubro separetly offers an optional fourand 8209 axis balancer shaft two 5mm DUBQ3380 to 6mm DUBQ3381.Specification:Condition: 100 percent brand newItem type: Prop BalancerMaterial: Plastic and MetalColor: black Weight: Approx. 326g Applicable to: RC multi-rotor, RC four-axis helicopter, RC hexagonal helicopter, for DJI Phantom, for DJI Inspire, for DJI F450, RC aircraft, RC helicopter.Package List:3 xBalancing board5 x Fixed column1 x English instruction26 x Screw accessories