The Zona Swivel-Head Pin Vise comes with two double-ended collets in the handle with 0" p .109" or 7/64" (0 p2.7686mm)capacity range. Hexagonal head keeps vise from rolling off of work surface. Holds small tools with round shanks including drills, burs, reamers, taps, needles, scribers: 0 p.05", .03 p.08", .05 p.10", and .07 p.11". Revolving head makes drilling fast. The pin vise is 4" long.