These are stair handrail accessories, which are divided into wall brackets, pipe brackets, and stubs for taking over and hosting. There are flanges, decorative covers, tube connectors, and tube caps. They can be connected to two types of tubes, round tubes,s, and square tubes. The round tube supports φ38.1mm. And φ50.8mm tube, square tube supports 30*30mm, 40*40mm, 50*50mm tube.