The Studica Robotics 120 Degree Bracket is ideal for connecting two channel pieces at 120 degrees from each other. Each side is 48mm wide to fit perfectly on the channel. Use 3 brackets with 3 channel pieces to make 3 wheeled robots. 

The Studica Robotics 135 Degree Bracket (2-pack) is ideal for connecting two channels pieces at 45 degrees from each other. Each side is 48mm wide to fit perfectly on the channel. 

The Studica Robotics 90 Degree Bracket is ideal for connecting two channel pieces at a 90 degree angle from each other. Each side is 48mm wide to fit perfectly on the channel. As with the other Studica Robotics building components, it has the common hole pattern which makes it easy to connect to other structure with very little or no additional machining required. 

The Studica Robotics Ultrasonic Distance Sensor Bracket is used to secure the Ultrasonic Distance Sensor to channels.