DF chain block is new design ,germany Technology: 1:suspension and load hooks are made of antiading alloy steel,high strength ,deformation occurs when the cse will be first event of overload without sudden fracture. 2.all spart use high quality material make.and plan coating ,can good be anticorrosive 3.strong the steel cover and plate good to protect inside spart structure 4.roller and gear structure all have cover to good protect,can use in every where. 5.load wheel use good material and producten precision,good for use load chain accuracy. 6.hook with safety latch securely can roate freely 360degrees .ergonomic handle design engineering so that the hoist is easy to operate. 7:closed design protects the internal components from contamination 8.all parts of the load disc brakes come on by the high quality steel and anti corrosion