26 Piece Set: One mini handle and 25 pieces of different size drill bits can meet your different needs, including 0.5mm / 0.6mm / 1.0mm / 1.2mm / 1, 5mm / 1.8mm / 2.0mm / 2.35mm High Quality: The hand drill is made of black aluminum alloy with non-slip handle, while the 25-piece drill bit is made of high speed steel to ensure this drill is ready for all the hobby and precision work you can devote to it, and manage your constructions with precision. Adjustable hand drill: 3 hardened steel clamps with claw, which can be equipped with drills of various sizes, including drill bits from 0.3mm to 3.4mm in diameter. Tension wire (internal thread) adapts perfectly to the underlying metal and remains stable. The metallic material makes it durable for long term use. After several times the drill will not slip or fall. Versatile hand drill: the hand drill set can be used to drill wood, resin, jewelry, nuts, horns, bones, olives, amber, wax bee, acrylic beads, plastic, PVC and many other home improvement projects that require precision drilling. Note: The adjustable swivel clamp is a hand tool, so it cannot be used with hard materials such as steel, iron, stone, etc. The hand drill is a hand tool, not a power tool. Do not touch steel, iron, stone, glass or similar hard material. Depending on the surface of the material, it may be useful to mark a location where you wish to drill.