this is a 35-degree angle bracket that can be used to mount things onto tetrix pieces. If you print this out for usage please can you leave a comment or give us a shout out, FTC teams and especially Teachers thank you for taking your time to do that. Teachers if you need a specific angle bracket or tetrix piece made just leave a comment on any one of tetrix angle brackets and I will try to create and upload the item as quickly as possible. Our robotics team is team number 12852 Extreme Robotics in First Tech Challenge.