The MLRK1-HAG/LAW/LSDA1 is a practical and cost-effective way to convert a mechanical Hager 4500, LSDA 9000 & Lawrence 8000 series device to an electrified latch pullback device. The retrofit kit will maintain all UL listings on the device and for peace of mind is backed by CAT’s 3-year no hassle warranty. It easily attaches to the dogging tail and is secured with (2) screws, in a matter of seconds. The only hole you’ll need to drill is for the wire raceway. PTS allows for a smooth post-installation adjustment of the latch/latches. Optional built-in REX switch is available! Last but not least, it features an updated MM4S module with 3 different energy consumption settings from energy conscious to high torque to get the tough jobs done!