EcoPower Mini Aluminum Clamping Servo Horn. Constructed from top-quality CNC-machined aluminum and anodized black for added durability with a clamping style design that provides a supremely secure fit. In addition, the horn features two mounting holes to accommodate different link lengths! This EcoPower horn is the ultimate upgrade for your 1/24 and 1/18 micro crawler platforms such as the Axial SCX24 and the FMS FCX24, or 1/10 platforms with shifting features equipped with the EcoPower ECP-640T micro servo or any other compatible micro servos with 25T spline!