Model Number:3-Jaw 4-Jaw Chuck Connecting Rod Number of Jaws:4 Power:Electric Origin:Mainland China Certification:CE It uses high-quality zinc alloy materials that are resistant to corrosion and are not prone to rust, providing a long service time. High strength and hardness, small size, wear resistance and with fine durability. Three specifications are optional, you can choose the chuck-drill connecting rod, the 3-Jaw chuck and connecting rod, and the 4-Jaw chuck and connecting rod depending on your demands.  It is mainly used in machine tool fittings and is suitable for clamping various industrial parts. Features: 【Premium Material】: Made of quality zinc alloy material, corrosion resistance, not easy to rust, can provide long service time. 【Fine Durability】: High strength and hardness, small size, wear resistance and with fine durability. 【Accurate】: Compact in size, easy to be used and with a high centering precise as well as a large clamping ranges. 【Easy to Use】: The chuck is equipped with special locking structure, save effort when tightening, very convenient. 【Functional Design】: Innovative design, self-centering, widely used for woodworking lathe. 【Three Specifications】: Three specifications are optional, you can choose chuck-drill connecting rod, 3-Jaw chuck and connecting rod, 4-Jaw chuck and connecting rod according to your demands. 【Wide Ranges of Applications】: It is mainly used in machine tool accessories,which is suitable for clamping a variety of industrial parts. Specifications: Material: zinc alloy Types: Connecting Rod, Connecting Rod+Three Jaw Chuck, Connecting Rod+Four Jaw Chuck (optional) Package size: Connecting Rod: 50 * 12 * 12mm / 1.97 * 0.47 * 0.47in Connecting Rod+Three Jaw Chuck: 60 * 50 * 50mm / 2.36 * 1.97 * 1.97in Connecting Rod+Four Jaw Chuck: 60 * 50 * 50mm / 2.36 * 1.97 * 1.97in Package weight: Connecting Rod: 31g / 1.09ounce Connecting Rod+Three Jaw Chuck: 220g / 7.76ounce Connecting Rod+Four Jaw Chuck: 225g / 7.94ounce Packing List: Packing List (Connecting Rod): 1 * Connecting Rod OR Packing List (3 Jaw Chuck Set): 1 * Connecting Rod 1 * Three Jaw Chuck 2 * Short Sticks OR Packing List (4 Jaw Chuck Set): 1 * Connecting Rod 1 * Four Jaw Chuck 1 * Wrench