Deckorators has [2x4 Stair Rail Connectors](https://www.diyhomecenter.com/deckorators-2x4-stair-railing-connectors-2-pack-black) for stair applications or [Multi-Degree Rail Connectors](https://www.diyhomecenter.com/deckorators-multi-degree-railing-connectors-2-pack-black) for 22° to 45° angle applications. These rail connectors are manufactured in China.