Resistance Cord & Door Attachment KitStrengthen the arms, chest, shoulders, and back with this Resistance Cord & Door Attachment Kit. Each resistance cord features comfortable foam handles that provide a non slip grip for safe exercise. This kit comes with a door attachment, so you can turn any door into a home gym in just seconds. Available in light, medium, and heavy resistances, all sold separately. Downloadable exercise included. Strengthen the arms, chest, shoulders, and back