it's frame system,can be used in small building and construction ... scaffolding systems ,such as cuplock,layher,plettac,ringlock,kwik-stage,frame,guardrails and accessories,couplers, formworks, barriers, walk platforms, ... ,Southeast Asia,and Africa. so this kind of frame scaffolding,it's very easy to be uesed for ... it's much cheaper than any other kind of system,so it's popular all the world! it includes ...