fit simplify resistance tube band set door anchor fit simplify <p>this fit simplify resistance tube band door anchor is specifically designed to work with our fit simplify 12 piece resistance tube band set. </p> <p>our padded door anchor can be used on any standard door and unlocks a wider variety of exercises you can do with your resistance tube band set. the door anchor loop is also large enough to hold multiple bands at once for added resistance.</p>