Features 1、High Strength: This key hub is made of premium aluminum alloy, which is durable, wear proof, high strength and more refined in appearance. 2、Purpose: It is fixed on the motor shaft through the key lock slot to fix the motor on the wheel hub for connecting the motor and the wheel. 3、Bending Resistance: In addition to beauty, aluminum alloy will not bend like plastic under pressure or at high ambient temperature. 4、Simple Installation: Unique design, cool personality, no complex steps needed to install, you can modify and install by yourself. 5、Replacement Parts: It is easy to disassemble, and the original parts or damaged parts can be replaced directly to obtain higher strength. Item Type: RC Key Hub Shaft Coupling Material: Aluminum Alloy Gross Weight: 73g / 2.6oz Type: RC Accessories Color: Silver Inner Diameter: 3/8in Outer Diameter: Approx.56.8mm / 2.2in Width: Approx.26.4mm / 1.0in Hole Diameter: Approx.9.53mm / 0.4in Suitable: for connecting motor and wheel Package List 1 x Aluminum Key Hub