Features: Steady precision clamp, high degree of concentricity, closing tight, solid and easy to smooth. Short handle reduces the overall length so that it can be hold easily, and drill bits are hard to break off. Semi automatic hand drill thickening nut, strong and not easy to crack. It is precise, accurate and efficient and tightly holds bit, can clip 0.8 3.0mm drill bits. Screw and half mechanical design, positioning accuracy, save time and effort. Specification: Material: Aluminum alloy Weight: 66g/2.3oz Color: Silver Length: 12.1cm/4.8inch Chuck Size: 0.5 3.5mm Bits Specification: 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.2mm, 2.5mm, 2.8mm, 3.0mm Package List: 1 x Drill 10 x Drill Bits