With the MX-28 Gear / Bearing Set you can replace worn or damaged gears in your DYNAMIXEL MX-28. Each gear is metal and has a special coating to increase endurance and durability. The Wheel gear also has a built in magnet, which is crucial to the magnetic encoder in the servo. This kit included 5 gears, grease, 2 bearings, and a calibration adapator tool. These gears are compatible with both the MX-28T and MX-28R. They are not compatible with the RX28/RX24 servos. You will need a...