The MetaltechSteel Guardrail Post with Wedge Clampis designed for installation on exterior scaffolding frames.To complete a set, buy a total of 4 posts. This sturdy pole is intended to be used in sets of 4 to support 5 ft, 7 ft, or 10 ft guardrails for added safety on the jobsite. The wedge clamp can be easily locked and unlocked with a rubber hammer. Guardrails are mandatory on all scaffolding platforms above 10 feet. The steel post is protected with a durable blue powder-coated paint and complies with ANSI, OSHA, and CSA safety standards.