Concept:
A vice is a holding device used to grip a workpiece during machining, filing, drilling or fitting operations.
Step 1: Small round materials like wires and pins are difficult to hold firmly by hand.
Step 2: A pin vice is specially designed for holding small diameter round objects.
Step 3: It grips small pins, wires, drills or similar objects safely and accurately.
Step 4: Leg vice and tool vice are used for larger or different types of workpieces.
Step 5: Therefore, the correct device is pin vice.
\[
\boxed{\text{Pin vice}}
\]