The NTM expandable arbor is used for holding coil on the New Tech 7" Commercial Box Gutter Machine, and the MutiPro Jr and SSR roof panel machines. The arbor expands to the inside diameter of the coil for easier loading and can accommodate coils with 16" to 20" inside diameter. Capacity is 3,000 lbs. when used with Dual Overhead Reel Stand or Single Free Standing De-Coiler.