Cable Drum Set Includes 3/8 in Set Screws For Use With Mfr Model Number 1 in Shaft Commercial Standard Lift Garage Doors Lifting Weight per Drum 1000 lb Maximum Height 32 ft 1 in Type Die Cast Aluminum For Use With Commercial Standard Lift Garage Doors 1 in Shaft Maximum Height 32 ft 1 in Lifting Weight per Drum 1000 lb 1 Pair