`Stretch wrappers are one of the easiest pieces of machinery to cost justify, use, and maintain. Easy, that is, if one understands the basics of specifying the correct stretchwrap machine for the application. Cost justification &mdash material and labor savings stretch film is engineered to be elongated, which means that once it is stretched the true characteristics of the material emerge. Because of its engineered properties, the film has much higher puncture and tearing resistance when stretched. It also has greater load holding ability.