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 easy‑to‑operate accessories‑follow 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/lower settings can accommodate options and even large props. 7. Dubro separetly offers an optional four‑axis balancer shaft two 5mm DUBQ3380 to 6mm DUBQ3381. Specification: Condition: 100% brand new Item type: Prop Balancer Material: Plastic + Metal Color: 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 x Balancing board 5 x Fixed column 1 x English instruction 26 x Screw accessories