This is called a tube power stretcher. This is the only type of tool that can properly stretch the carpet being made today. If someone is installing carpet in your home without using this piece of equipment and using it properly, you are almost certain to have problems with wrinkling of your carpet. We require our installers to use a power stretcher on every stretch-in carpet job, and we make sure that they know how to use it right. Otherwise, they don't work for us. This is just one of the many ways that we practice our commitment to quality, and it is that commitment that separates us from the rest.