This Kit contains a Makeblock high torque(15kg.cm) digital servo and 2 servo bracket, with these bracket, it's easy to build a joint for a robot, also there are a lot of ways to conenct the servo with other Makeblock Parts.PART LIST1x MECDS-150 Servo Motor2x MECDS-150 Servo Bracket8x Screw M4x88x Plastic Ring 4x7x2DOCUMENTS Visit Makeblock overview website to get more information about Makeblock and see what other application and extension kits are already available. If you have any further question for technical support, please contact waker@makeblock.cc or visit forum of Makeblock.