Pin vices are chiefly used for holding small taps, reamers, scribers or wire. The handles are tubular which permit holding wires of any length or diameter up through the length of the tool.
Set of four: 1 of each size 1, 2, 3 & 4.
Size. 1 0 -1mm
2 0.75 - 1.5mm
3 1.5 - 3mm
4 3 - 4 mm