Mega Jumbo Jaws for Oneway Stronghold Chuck

These machined solid aluminum plates mount to the Oneway Stronghold Chuck (30589, sold separately), and they have a unique combination of slots and tapped holes that accept rubber grippers for holding an infinite number of round, oval or square shapes. Chucking capacities of the Stronghold Chuck with Mega Jumbo Jaws: External (compression): 1-3/4" minimum, 14" maximum Internal (expansion): 4-3/4" minimum, 15" maximum Note: If your lathe has less than a 16" swing, the Oneway Talon Chuck (20761) is recommended. Stronghold Chuck jaws are NOT compatible with either the original Oneway Chuck or the Talon Chuck.