Heavy-Duty Drill-Press Vise StationRugged design and large workload capacity make these vises perfect for the most difficult drilling, tapping or reaming operations. The 1300 series is made of graded cast iron and offers a ground vise bed for a smooth, consistent jaw movement and hardened top U-groove jaws. The 1400 series is made of graded cast iron and features precision 90º machining of the vise's sidebodies, which allows them to be used additionally as bases. A rapid action nut exists on the 1400 series for fast loading and unloading of production material; the nut provides extra tightening capabilities. The sturdy main castings on the 1400 series provides extra strength and increased durability. Jaw Material: Steel; Jaw Opening: 6 3/4 in; Jaw Width: 6 in; Locking Type: Threaded; Material: Cast Iron; Nut Type: Rapid Acting; Throat Depth: 2 1/8 in; Weight: 28 lb.