Rugged 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 90 machining of the vises 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.