WIDE APPLICATION: Compact size, useful for electronic assembly, tooling, model making, winding, home improvement, and hobby projects. This multi-purpose hand drill is ideal for drilling small holes in wood, plastic, rubber, PVC, walnut, models, bones, horns, amber, olives, jewelry, and other similar materials. Suitable for various DIY projects requiring precise hole drilling. Not intended for use on hard materials such as steel, iron, or stone.PRECISE AND DURABLE: The mini hand drill and 25-piece twist drill set are made of high-speed steel, ensuring reliable performance for hobby and precision tasks. The ribbed handle provides good grip and leverage for smooth operation, allowing better control during detailed work.ADJUSTABLE: Features a 3-jaw hardened steel chuck that securely holds a variety of drill bits with diameters ranging from 0.3mm to 3.4mm. The adjustable drill holder accommodates different bit sizes, offering versatility for multiple applications. The tightening thread is designed to fit securely on the corresponding metal components for stable use.PORTABLE AND VARIOUS SIZES: Pen-style design for easy carrying and storage. Includes 25 drill bits in assorted sizes: 0.5mm, 0.6mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.35mm, and 3.0mm, meeting a wide range of drilling needs.