About Us Tianjin Hollysen Metal Product Co. Ltd is one of the biggest scaffold manufacturer in North of China . We take bang-up pride in our inviolable production capability that comes from the comprehensive deployment of such production lines as forging , punching , foundry , metal processing and powder coating . We can provide you the scaffold , system scaffold , forged clamps , caster , side bracket , screw jack , coupling pin , guard rail post , cross brace . The output per year is 20000 tons .