041-0155-000 is a Safety Sensor Bracket Replacement Kit. For use with various LiftMaster and Chamberlain Belt Drive and Chain Drive Garage Door Openers. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility. IMPORTANT NOTE: The new safety reversing sensor brackets are only compatible with the new safety reversing sensors (041-0136) and are NOT compatible with older style safety reversing sensors. For safety reversing sensor brackets compatible with models pre-2021, refer to 041A5266-3.