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Operator Brackets (ORB / ARB) + T-Rail Mounting Brackets
ORBs are what keep your opener from ripping through the top panel. They spread the pulling force across the section so the panel doesn't crack and the bolts don't pull through. Sizes for 18, 21, and 24-inch sections in zinc or white. ARBs do the same job but they're adjustable. T-rail brackets are the mounting hardware for LiftMaster, Chamberlain, and Craftsman rails — ceiling, header, or rafter mount. Match the section height and compare your hole pattern.