Feature:1. HIGH STRENGTH: Universal joint shaft coupling is made of steel, which is strong, wear resistant, durable, not easy to damage, and has a long service life.2. TWO SECTION DESIGN: Universal joint coupling connector is designed with two sections, flexible, drive large angle, easy to install and replace.3. SCOPE OF APPLICATION: Universal joint couplings are widely used for shaft connection and can be used in various model cars and model boats.4. ARBITRARY BENDING ANGLE: Universal joint couplers can be bent at any angle to meet your diversified needs, and can be used for motors, etc.5. PACKING LIST: 2mm universal joint shaft coupling package contains 5 mini coupling universal joints, 10 grub screws and 1 wrench.Specification:Item Type: Universal Joint Shaft CouplingMaterial: SteelColor: SilverLength: Approx. 17mm / 0.7inDiameter: Approx. 8mm / 0.3inConnection Hole Aperture: Approx. 2mm / 0.1inApplication: RC Model Cars, Model Boats, Etc..Package List:5 xUniversal Joint Shaft Coupling1 x Wrench10 x Grub ScrewNote:Please allow some error due to manual measurement.