Roller skate with higher quality and longer working time

Load roller with all sizes and many models. Roller skate with higher quality and longer working time Roller skids with go forward and veered one. We produce all kinds of load roller skids professionally for more than 20 years with higher quality and competitively price. We can produce follow kinds of roller skate: Multi-load roller skids which have three sets of roller and the ahead one can veered for 270 degree. Behind it is two sets of go forward load roller skids. This kind of load roller capacity can reached to 600 tons. Roller skates with crawler, this kinds of load skate just can go forwards. And the capacity can be more than 500 tons for one set. http://www.cargotrolley.com/