10', Galvanized Trolley Rail, Designed For Doors Weighing Up To 450 LB, Can Be Used With Many Types Of Single & Multiple Brackets, Galvanized Coated Steel, Use With 24" Bracket Spacing, Screws For Attaching Rail Are Packed With Brackets (Order Separately), Use #770956 when installing single rail, #773125 Bracket is needed when joining 2 or more pieces of track together. Meets ANSI/BHMA A156.14, Grade 1 Specifications.