Mighty Mule L500B Automatic Cable Gate Lock, Black A sturdy 500 lbs. holding force to prevent unwanted intrusion that is ideal for use with cable, chains, or ropes Easy DIY (Do It Yourself) installation that mounts to metal or wood posts; round or square dimensions Requires 4-8 AA batteries (not included) Works perfect with the Mighty Mule Single Button Gate Opener Remote (FM135) or the Mighty Mule Digital Keypad (FM137). Backed by a 12 month Mighty Mule Warranty and Technical Support A sturdy 500 lbs. holding force to prevent unwanted intrusion that is ideal for use with cable, chains, or ropes. Easy DIY (Do It Yourself) installation that mounts to metal or wood posts; round or square dimensions. Requires 4-8 AA batteries (not included). Works perfect with theMighty Mule Single Button Gate Opener Remote (FM135) or the Mighty Mule Digital Keypad (FM137). Backed by a 12 month Mighty Mule Warranty and Life Time Technical Support.