*KeyFeatures *Premium Steel Structure: Chuck body made of quality cast iron. All guide ways and bearing surfaces are precisely machined for better performance. Flimsy parts are specifically engineered by quenching process to enhance durability. *Large Clamping Range: Each jaw can be adjusted separately to center with superior gripping force. Front Jaw Clamping Range: 0.236"-1.77"/6-45 mm. Back Jaw Clamping Range: 1.57"-3.93" / 40-100 mm. *High-Performance Chuck: The wood lathe chuck jaws and three jaws are self-centering, the alignment accuracy is less than or equal to 0.003" / 0.07 mm, and no adjustment is required after installation. The high precision design of the chuck bevel gear guarantees the accuracy of the chuck operation. *Effortless Operation: The lathe chuck has an automatic centering function, so it does not need to be repeatedly calibrated during installation. We offer a lever to help to tighten and loosen the chuck, make the installation and removal more convenient and saves you more time. *Wide Application: Suitable for the general lathe, grinder, milling machine, drilling machine and machine accessories, woodworking machinery accessories and other machine tools and accessories. ******************************************************************************************************* *Specifications Chuck Body Material: Cast Iron Jaws Material: 20CR Steel Bevel Gear Material: 40CR Steel Pinions Material: 20CR Steel Chuck Diameter: 3.93" / 100 mm Internal Jaw Clamping Range: 0.236"-1.77" / 6-45 mm External Jaw Clamping Range: 1.57"-3.93" / 40-100 mm Tolerance: 0.003" / 0.07 mm Item Diameter: 4 in / 10 cm Gross Weight: 6.9 lb / 3.12 kg ******************************************************************************************************* *Pakcage Content 1 x Lathe Chuck 4 x Mounting Screws 1 x T Wrench