Steelex D3606 2-Inch 3-Jaw Chuck 2 inch; 3-jaw; plain back Inside jaw minimum/maximum jaw openings are .08 to .563 inches/.563 to 1.4 inches Outside jaw minimum/maximum openings are 1 to 1.375 inches Outside jaw minimum/maximum openings are 1 to 1.375 inches Jaws measure 0.590 inches tall