The end brackets come in pars with fastenners included.
Note: The DIY work includes drilling 4 x holes. Installing rivet nuts with a rivnut tool. (Rivet nuts supplied). If you do not have a Rivnut tool here is a simple way to install with standard tools: Rivnut DIY install video
The end brackets are an alternative to U Bolts. The end brackets are designed to be mounted internally to avoid window interference and interference of side doors.