Almost ZERO friction - Accurate Propeller Balancer for Multi-rotors and Planes.
It's a simple gadget yet very important to all multi-rotor or plane owners, you have to balance the propeller before you put onto the aircraft, this is to eliminate any vibration caused by the spinning propeller and that will transfer to the body, affecting the Gyro calculation or other electronic device, Helipal strongly recommend this to you. The balancer itself is pretty good quality, made with real carbon fiber and strong magnets, the shaft is hovering between the magnets for almost zero friction, that makes the balancing more accurate.