The GoFit 5lb Smartweight Power Tube is a great training tool for toning, strength training and rehabilitation. Each Power Tube comes with comfortable, contoured handles and the GoFit Door Anchor to allow you to perform virtually any upper body exercise done on a home gym anywhere and any time. Also included is a large exercise poster to get you started on a great workout routine. All GoFit Power Tubes are great for travelers as they are compact enough to fit in a carry-on bag or brief case. The Smartweight Power Tube has been tested to have a comparable level of resistance to a 5lb dumbbell.