Made from 3mm thick heavy 6061-T6 Aluminum, the Studica Robotics Inside U Bracket (2-pack) is 42mm x 45mm and is used inside a U-Channel or Low profile 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. You can easily connect to other channel, extrusions, bushings, bearing, mounting brackets and more so you can quickly assemble and disassemble robots and automated systems.