ABOUT THE MATERIAL WEDO Jumbo steel tools adopt 40 Chrome Steel as the raw material, processed by one-time die forging technology with large friction machines. WEDO products are manufactured according to DIN standard of Germany or GB standard of China; they are widely used in shipyards, heavy machinery, mining equipment and so on. Features: excellent mechanical properties, strong torque, special black epoxy surface treatment, environmentally friendly, corrosion resistant.