This 4-jaw self-centering chuck provides stable support for precision machining. It is made of high-class materials to ensure long-term use without deformation and is suitable for a wide range of machine tools. The wide clamping range can be easily adjusted to meet the clamping needs of different sizes of workpieces, giving more stable, convenient, and accurate clamping performance, making it an ideal choice for you to improve work efficiency and machining accuracy. Key Features Sturdy and Durable: Made of high-class iron and steel, the product boasts high sturdiness and strong structure, ensuring excellent wear resistance and a long service life. Wide Compatibility: The 0.098-1.57in internal jaw clamping range, 1.5-4.33in external jaw clamping range, and 1.5-4.92in jamming range ensure a wide range of clamping and applications to meet your multiple usage needs. Thoughtful Design: The product features a self-centering function that can automatically adjust the machining center position, guaranteeing the accuracy and stability of the workpiece while enhancing machining efficiency and quality. Easy to Carry: The compact size(4.92 inches in diameter) allow you to store it without taking up much space. Excellent Performance: The great clamping force ensures a tight clamping for the object, allowing the object to remain stable even at high RPMs and preventing it from loosening and falling. Details Smooth Edges: These burr-free edges are safe for your hands and skin, preventing them from scratching during installation. Chuck Wrench: The wrench and the complete set give the convenience of assembling and installing the product with less time and effort. Application The products are suitable for general machine tools, CNC machine tools, milling and drilling machines, machining centers, etc., to help quickly complete the clamping, milling, drilling, turning work. 🔹125mm Specifications Color: Silver Material: Iron, Steel Max. Speed: 3000r/min Compatible Devices: Lathe Internal Jaw Clamping Range: 2.5-40mm/0.098-1.57in External Jaw Claw Clamping Range: 38-110mm/1.5-4.33in Internal Jaw Jamming Range: 38-125mm/1.5-4.92in Centering Precision: 0.07mm/0.0028in Chuck Hole Diameter: 30mm/1.18in Product Diameter: 125mm/4.92in Package Size: 17.5*17.5*16cm/6.89*6.89*6.3in Gross Weight: 6kg/13.23lbs Net Weight: 5kg/11.02lbs 🔹100mm Specifications Color: Silver Compatible Devices: Lathe(Not Included) Style: Modern Material: Cast Iron, Steel Chuck External Diameter: 100mm/3.94in Clamping Range: 30-90mm/1.18-3.54in Gross Weight: 4kg/8.82lbs Net Weight: 3.8kg/8.38lbs Package Size: 15*15*14.5cm/5.91*5.91*5.71in Package Included 1* 4-jaw Self-Centering Chuck 1* External Jaw Set 1* Internal Jaw Set 1* Chuck Wrench 3* Screws Notes 1.Please check the size carefully before ordering. 2.This product needs a flange (not included) to be fixed on the lathe.