2pcs 3mm-3mm Golden Brass Shaft Coupling Coupler Motor Transmission Connector Ideal accessories for RC Model motor, such as airplane boat model. Widely used in metal, mold, mechanical drive applications. 2pcs 3mm to 3mm Brass Shaft Motor Flexible Coupling Coupler Connector For RC 2pcs 3mm to 3mm Golden Brass Joint Motor Shaft Coupling Adapter For RC Aircraft Package Include: 2 x Motor Shaft Coupling Connector 1 x Allen Wrench 8 x Screws