SpecificationsMaterial : AluminumColor: TitaniumOverall length: 35mmThickness: 6mmHole Diameter: 6mm(Large) / 3mm (Small)Hole centers at 20 and 24mm from the servo output(Measured From Hole Center To Hole Center)Features:23T SplineAluminum CNC machined for precision.dIncludes two bolts to secure the split-clamp onto the servo outputHard aluminum construction for precision and durability.Adjustable type servo arm,includes two steel bolts to secure the split-clamp onto the servo output.for: RC Cars Boats Airplanes RobotsProduct Description23T Spline & M3 threads Fit Mostly Standard Servo MotorsSuitable for mostly 23T Standard Servo Motor Brands,such as for 3001 3005 3003,etc.Package Include:2 x 23T Aluminum Servo Horn