The cuplock horizontal plays the role of support in the complete scaffolding cuplock system. The shorter horizontal can be used as the horizontal support for planks or as the guardrail. Insert the both ledger blade ends of cuplock horizontal into the bottom cups of cuplock standards, then press and rotate the top cups, fixing them with a stop lock. The cuplock horizontal can be conveniently connected to the cuplock standard, and forming the whole scaffolding cuplock system with a cuplock horizontal and diagonal. The horizontal is hot-dip galvanized.