Construction: The pin vise is made of aluminum alloy with a 3-jaw chuck and an adjustable clamping range of 0.3-3.4 mm. The PCB drill bits are made of , while the micro-type twist bits are made of sturdy alloy steel for long-term use. Versatile Hand Drill Set: Includes a pin vise hand drill, 25 micro-type twist drill bits, and 10 PCB mini drill bits, perfect for jewelry, resin, and polymer clay crafts. Size: This set contains micro-type twist drill bits from 0.5 to 3.0 mm and PCB micro-type drill bits from 0.1 to 1.0 mm, which provide the required for fine projects and are suitable for complex manufacturing and repair tasks. Wide Range of Applications: Great for drilling holes in wood, plastic, rubber, PVC and more. Ideal for FR-4 and -3 boards, CNC, molds, circuit boards, carbon fiber and composite boards, the PCB micro-type drill ensures versatility in your projects. Portable and Convenient: The compact design makes it easy to carry and store in a toolbox or pocket. This set of tools enhances the convenience of electronic assembly, model making and home decoration, allowing you to work efficiently wherever you are., Weight: 0.2094391489 Pounds, Manufacturer: susaa