These jaws have the same capacities as the profiled #3 Jaws (and are offered at the same price). The inside and outside surface of the jaws is smooth. They are designed (and recommended) for light cutting applications. These jaws will not mark your work as much as the profiled #3 Jaws, but will NOT grip with the same power either.
All the measurements below are in INCHES and are accurate to within 1/8".
External (compression) chucking capacity: 2" to 3-1/2"
Internal (expansion) chucking capacity: 2-5/8" to 4-1/2"
Optional accessory for Oneway Stronghold