Different Size Twist Drill Bits - Includes 48 pieces micro twist 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 manydrill sizes.Wide Application- Model making hand drill is used for precision punching, making tool, model drill, a great tool for making art, craft, jewelry hanging and sculpture etc.Comfortable handle easy to learn and operate.Durable and Sturdy - Our mini hand drill made from high quality aluminum alloy, perfect for drilling in wood, plastic, rubber, PVC, walnut, model, bones, horns, etc.amber, olives and other materials.Not a power tool, cannot adapt to hard things like steel, iron, stone.Hand Drill Kit - Package includes a black hand drill, 48 pieces twist drill bits, a small pliers and a transparent storage box.All the twists drills bits, the black multifunction drill and the mini pliers are stored in the transparent box, perfect to go in a toolbox or pocket, The pliers can help you get the miniature micro drills easily.