1.MOTOR REAR VIEW SCREW HOLE BASE MOUNT The mount base can be installed on the motor rear view tube through the hole with diameter of 0.39 in 2.Rear View Pole Mount This design is for the rear view pole. You can choose the pad with different thickness to fit the pole. There are four sizes provided to avoid any scratch on your motor. It's fixed by tightening the screw 3.Motor Handle Mount It comes with a rubber gaskets that grips the bar firmly and prevents slipping or scratch. With all metal construction, your camera will be locked stably by U shape screw without any vibration. 4.360 DEGREE ROTATION The unique spherical connection and the doublesided opening design allows flexible rotation. It's easy and convenient to adjust to get the perfect shooting view. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.