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Profile: Nanjing Yikai Metalware Co.,Ltd. specializes in providing scaffolding products. Our scaffolding products include forged coupler, pressed coupler, ringlock systems, cuplock systems, frame system, shoring system, formwork system, aluminum scaffolding ladder and all sizes of steel tubes. Scaffold couplers are used to connect steel pipes when building scaffolds, and connectors between steel pipes and other structures, are widely used in various types of scaffolding projects. Swivel coupler is flexible of the three common scaffolding couplers. Sleeve Coupler used for the butt joint connection of two scaffolding steel pipes, mainly vertical pipes, horizontal pipes, and diagonal braces.