Durability Iron Construction: Robust metal design enhances longevity and provides stable for remote servo connectors and transmission mechanisms Connection: Delivers accurate linkage alignment for control responsiveness in remote airplanes, boats, and helicopters Model Specific Sizing: Available in 1.2mm / 1.8mm / 2.1mm option with 2mm thread diameter for compatibility for various remote components Adjustable Diameter Compatibility: Fit 2.1mm / 1.8mm / 1.5mm / 1.1mm pushrods, ensuring versatile use across different remote models and servo linkages Premium 10Piece Set: Includes multiple board adjusters to meet various remote model building and maintenance needs for airplanes, boats, and helicopters, Manufacturer: Shntig