Various Size Twist Drill Bits- Includes 48 pieces micro countersink drill bit, 0.5/ 0.6/ 0.7/ 0.8/ 0.9/ 1.0mm (3 pieces for each size); 1.1/ 1.2/ 1.3/ 1.4/ 1.5/ 1.6/ 1.7/ 1.8/ 1.9/ 2.0mm (2 pieces for each size); 2.1/ 2.2/ 2.3/ 2.4/ 2.5/ 2.6/ 2.7/ 2.8/ 2.9/ 3.0mm (1 piece for each size). which can meet your varieties of needs in daily life. Precision Adjustable Hand Drill- The 3 jaw chuck could grip the mini micro drill bits tightly by rotating one end of the model hand drill, the diameter range of the drill bits is 0.3 - 3.5mm, which can fit to many drill sizes. Wide Application- Model making hand drill is used for precision punching, tool drill making, model, a great tool for making art, crafts, jewelry hanging and sculpture etc. the easy comfortable handle to learn and function. Durable and Sturdy- Our mini hand drill made from high quality aluminum alloy, perfect for drilling in wood, plastic, rubber, PVC, walnut, model, bone, metal horns, amber, olives and others materials. Not a power tool, can't adapt to hard things like steel, iron, stone. Hand Drill Kit- Package includes black hand drill, 48pcs twist drill bits, small pliers and transparent storage box. All the twist drill bits, the black multifunction drill and the mini pliers are stored in the box transparent, perfect to go in a toolbox or pocket, The pliers can help you get the miniature micro drill bits easily.