The Command Access PD21 series is a motorized latch pullback Grade 1 narrow stile architectural exit device; made for use on contemporary glass aluminum doors. They may also be used on wide stile doors for an appearance on institutions and commercial buildings when heavy-duty, fire, and life safety operation is required. All PD21 models come equipped with our PTS “push to set” technology. We know that door conditions change, especially in retrofit scenarios. However, with our PTS adjustment, your post-installation adjustment is greatly simplified in 5 quick seconds. Install this device with the confidence of knowing that the 21 meets or exceeds the high standards of another grade 1 product and carries our 3-Year “No-Hassle“ Warranty, meaning we support you.