This is a Swivel Head Pin Vise from Gyros Products.

FEATURES: Used for holding tiny drill bits, taps, reamers, cutters/routers,
            pins, scribing/etching needles, wire, screws, wooden polishing
            sticks, etc.
          Two double-ended collets are conveniently stored in the barrel when
            not in use.
          Carded packaging.

INCLUDES: One Swivel Head Pin Vise.

SPECS:    Length: 3-5/8"
          Barrel Diameter: 5/16"
          Collet Capacity: 0"-1/8"
                                                                   sdw 10/25/01
                                                                          ir/kh