Features: The helicopter cross corrector, adjusting the aircraft does not rely on luck, corrector can make your cross in place. Other regulators on the market have to remove the spindle, but we don't need to remove the spindle. Attention: This product is adjusted by adsorbing the spindle, such as the spindle does not contain iron or the content is very little can not be used, so you can first use magnets to adsorb the spindle of your own aircraft, if you can adsorb, you can buy, cannot only replace other tools. Usage method: 1. Push the magnet and hold the spindle 2. Push the cross corrector to touch the spindle at two points 3. Gently pull the magnet out of the spindle 4. Move up and fit the lower edge of the cross so that there is no gap between the cross and the tester, representing the level. Special for helicopter of the item. Small for: (380/450/470) helicopter Large for: (500/550/600/700/800) helicopter How to use: 1 Push the magnet attracts spindle 2 Push Swashplate measuring device to two o\'clock touch the spindle 3 Gently pull the magnet, so the magnet away from the spindle 4 Move along swashplate fit, so swashplate directly with no gap measuring device, namely the level of Rotor head without disassembly, easy to use better.