For aluminum Hand Drill hobbyMini wood hand drill chuck for jewelry tool mini twist bit;Precise, Accurate and EfficientSuitable for wood, plastic,rubber,model and others material to drilling hole.Do not fit steel, iron,stone,such hard thingsPerfect for Drilling Wood,Jin Gang,Linden,Horn,Amber,Olive,Walnut,Plastic and other materials.Material: Aluminium AlloySizeColor BlackChuck Clamping Range:0.3-3.2mmHigh precision,can clip 0.3 -3.2mm drill bit.10pcs Mini Twist Drill BitsMaterial: High Speed Steelsuitable for PCB, crafts, jewelry, watch makingMini mini Drill Bit Set Pcb Hobbymini HSS High Speed Steel Straight shank Twist Drill BitsMini Drill Bits,Electric Drill Power ToolsPackage included1 x Hand Drill+10 pcs wist DrillsNote:Light and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm.