suitable for aluminum Hand Drill hobby Mini wood hand drill chuck suitable for jewelry tool mini twist bit;Precise, Accurate and Efficient Suitable suitable for wood, plastic,rubber,model and others material to drilling hole. Do not fit steel, iron,stone,such hard things Perfect suitable for Drilling Wood, Gang,,Horn,Amber,Olive,Walnut,Plastic and other materials. Material: Aluminium Alloy Size Color Black Chuck Clamping Range:0.3-3.2mm High precision,can clip 0.3 -3.2mm drill bit. 10pcs Mini Twist Drill Bits Material: High Speed Steel suitable suitable for PCB, crafts, jewelry, watch making Mini mini Drill Bit Set Pcb Hobby mini HSS High Speed Steel Straight shank Twist Drill Bits Mini Drill Bits,Electric Drill Power Tools Package included 1 x Hand Drill+10 pcs wist Drills Note: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.