Several cargo trolleys can be used at the same time if the heavy load can be supported at several points and the weight is evenly distributed. Moving roller skids suitable for large project, large bride installation, removed works. Moving roller skids is high capacity with low profile, the wheels can be polyurethane wheels, nylon wheels, alloy steel wheels and so on. Regarding load roller skids applications, moving roller skates manual instruction, moving dollie skates price list, roller skids kit details, please kindly feel free contact with us. Professionally service hope will get your satisfaction. Shan Dong Finer Lifting Tools co.,LTD Skype: faithjiang888 Email: [email protected] Website: http://www.cargotrolley.com/