Perfect Bands provide ultimate versatility with the Attach Anywhere System. Perfect Bands let you create the perfect level of resistance for you and they attach almost anywhere. The Attach Anywhere System allows you to attach the bands to the handles, pullup bars, or door frames using the included door anchor. The options are almost endless, just be creative and find sturdy structures to add variety to your workout. Use the 10 lbs. and 15 lbs.