Hydraulic car body shredder machine is used to heavy metals through the double shaft works . In car recycling business, normally the motors, transmission ,axles, hub and wheels are removed in advance, because as valuable part, they can be sold at high price , and some parts can be used for maintenance use. when these are removed, the car body can be shredded into metal fractions, even with further processing to make them into density metal, all these can be sold to steel mill to melted and reuse again