Features: _x005f_x000D_ 1. Made of high quality metal material, wear resistant and durable in use. _x005f_x000D_ 2. The chuck can clamp 0.3-3.4mm shank diameter tools like drill bits, used for drilling, polishing and grinding. _x005f_x000D_ 3. The chuck adopts anti-skid texture design, which can be conveniently tightened with hand. _x005f_x000D_ 4. The brass connection rod have different hole diameters and can be mounter into motor shaft in corresponding diameter. _x005f_x000D_ 5. Compatible with most of rotary tools such as mini power drill, electric grinder, etc. _x005f_x000D_ _x005f_x000D_ Specification: _x005f_x000D_ Material: Brass + Aluminum alloy _x005f_x000D_ Clamping Range: 0.3-3.4mm _x005f_x000D_ Outer Diameter: 10mm _x005f_x000D_ Mounting Hole Diameter: 2mm /2.35mm/3.17mm/5mm (Optional) _x005f_x000D_ Package Weight: 25g (approx.) _x005f_x000D_ _x005f_x000D_ Package List: _x005f_x000D_ 1 x Chuck _x005f_x000D_ 1 x Connection Rod _x005f_x000D_ 1 x Hex Wrench