Features -For aluminum Hand Drill hobby -Mini wood hand drill chuck for jewelry tool micro twist bit -Precise, Accurate and Efficient -Suitable for wood, plastic,rubber,model and others material to drilling hole. -Do not fit steel, iron,stone,such hard things -Perfect for Drilling Wood,Jin Gang,Linden,Horn,Amber,Olive,Walnut,Plastic and other materials. Specifications Material: Aluminium Alloy Color :Black Chuck Clamping Range:0.3-3.2mm High precision,can clip 0.3 -3.2mm drill bit. Material: High Speed Steel suitable for PCB, crafts, jewelry, watch making Mini Micro Drill Bit Set Pcb Hobby Micro HSS High Speed Steel Straight shank Twist Drill Bits Mini Drill Bits,Electric Drill Power Tools Package included Size 1: 10 pcs twist Drills Size 2: 1 x Hand Drill Size 3: 1 x Hand Drill+10 pcs twist Drills