The Open Tread Anchor (Part # ES30020) is a Grade 304 stainless steel anchor designed to provide support for a 1.66" diameter tube, which can be used to create a newel post. The anchor has a minimal footprint, allowing the tube to slip over it securely. Please note that the tubing itself is not included and needs to be bought separately. The Open Tread Anchor provides a reliable and durable solution for constructing newel posts in various applications.