These 3.31 inch by 3.31 inch by 3.38 inch cable drums are designed for single spring operator assemblies. They are available for both roadside and curbside applications. The large die-cast cable drums are grooved to prevent cables from binding or wearing prematurely. The angle of the cable slot determines whether it is a left or right drum. Made of cast aluminum, these cable drums are sold individually and fit most single spring operating assemblies and applications. They offer practicality and durability, ensuring smooth and efficient operation.