what connectors do I use to make a 45degree angle with this railing

Thank you for your question. We do not offer specific brackets for a 45-degree angle. The brackets included in the kit are designed to accommodate installation up to a 45° angle. Bottom rail brackets may need to be slightly offset to one side to fit properly and securely hold the rail in place. Before attaching the bracket to the rail, please measure and mark carefully to ensure the bottom rail remains parallel to the upper rail. Thank you - Trex Customer Care