10 Twist Drill Bit 0. 8 - 3mm + Swivel Head Pin. High Quality Precision Pin Vise Drill With 10pc Twist. Chuck Clamping Range: 0.5-3.0mm (available for drill bit of Dia 0.5- 3.0mm ). Mainly suitable for the materials of wood, resin, jewelry, walnut, amber, beeswax, olive nut, beads, PVC, acrylic and plastic, etc.