Give yourself the peace of mind that comes from enhanced security for your driveway gate with the GTO FM144 Automatic Gate Lock available at North Shore Commercial Door. Simple to install, with bolt-on or weldable hardware included, the GTO FM144 is wired directly to the gate opener's control box and is activated by Mighty Mule or GTO/PRO Access Controls, including the Entry Transmitter, GTO RB741 the GTO FM139 Gate Opening Sensor, the GTO F310 Digital Keypad or the GTO RB101 Push Button Control. The GTO FM144 will give you maximum security on GTO PRO gate openers. Use it for animal enclosures, high-wind areas, and gates that are more than 8 feet long. The GTO FM144 comes with two keys for manual release of the gate lock.