Widely Compatibility:This multi quick change keyless chuck is suitable for most Dremel rotary tools, including models 4000, 3000, 8200 and so on. Support 0.3mm to 3.2mm shank diameter accessories, such as drills, grinding wheels, polishing heads, etc., easily meet a variety of processing needs. Quick Change: This keyless chuck adopts keyless quick chuck, easy to change accessories without tools, just rotate it to fix it firmly, improve working efficiency and save operation time, suitable for all kinds of DIY or crafts. High-strength Alloy Mterial: This rotary tool chuck is made of high-quality alloy steel, sturdy and durable, safer than plastic collets, the overall one-piece molding, to ensure that it is still stable and reliable at high speed rotation. Accurate Clamping: This replacement keyless chuck can accurately hold small-sized drill bits, reduce vibration and improve machining accuracy. The built-in spring structure runs smoothly and is durable for long time working. Package Content: You will receive 1pc keyless self-tightening drill chuck, which helps you to easily convert your impact drill/rotary hammer into a drilling machine. Perfect for DIY, woodworking, jewelry processing, polishing and grinding and many other application scenarios., Manufacturer: Tabanzhe