Super Anchor Door & Window Jamb Anchor* Utilizes a window or door opening 24 to 48 inches wide. * The door and window jamb anchor is placed against the window frame and is fully adjustable to give you a safe, secure, temporary anchor point. * Designed for a single user. * The lightweight construction makes this temporary anchor easy to transport from job to job. * This non penetrating solution works well on finished structures. * May be used with a vertical lifeline or self retracting