The LiftMaster 1707LM 7-Foot Chain Drive Rail Assembly is a durable, one-piece rail designed for 7-foot tall garage doors using compatible LiftMaster or Chamberlain chain drive openers. Ideal for new installations or replacements, it ensures smooth, reliable operation—check your manual for model compatibility.

• One-piece rail design for easier installation

• Specifically made for 7 ft. tall garage doors

• Works with select LiftMaster and Chamberlain chain drive openers

• Helps maintain smooth and consistent garage door movement