[One-piece design]2022 new designed Quick Change Chuck, with one-piece structure design, alloy material, strong and durable, more safe and durable compared to plastic and old models. The concealed three-jaw chuck is well made and the built-in spring is solid and durable.[More solid]This Quick Change Chuck has a great improvement in precision and can hold these tiny bits more securely, better aligned with the rotation of the tool, it not only maintains stability but also improves efficiency under high speed rotation.[Quick change]Quick Change Chuck can hold a variety of accessories from 1/32 inch to 1/8 inch size. Be careful to measure the comparison size before purchase. Our Quick Change Chuck is compatible with for 4000, 400, 3000, 300, 395, 398, 8220, 8200, 8100, 800.[Wide compatibility]This chuck thread: 9/32-40, length: 23.5mm, diameter: 14mm, Chuck is compatible with all for cordless and corded rotary tools (including drills, grinding wheels, polishing wheels and other light accessories)Colour:blackMaterial:MetalPackage Contents:2 * for chuckOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.