Features: This drill chucks features an advanced hand tightening auto locking mechanism, enabling quick and secure bit changes without tools for enhanced efficiency in continuous operations, ideal as a power tool accessory. Offered in short and long versions, the short metal chucks is compact for tight spaces, while the long provides superior grip and leverage; both support a wide clamping ranging from 0.8mm to 10mm for various drill bits. Designed for professional craftsmen, DIYer enthusiasts, and users who frequently switching bits during precise tasks, this fast change chucks ensures reliably performances. Ideal for confined areas like cabinets or under sinks, as well as high demanded scenarios requiring repeated bit changes, this drill chucks maintains stability and accuracy. Constructed entirely from premium alloy steel, this chucks offer high concentricity, reduced wobble, and long lasting reliability in heavy duty applications. Specifications: Color: black Component: alloy Long styles: 7.1x4.3cm/2.8x1.69inch Short styles: 5x4cm/1.97x1.57inch Package Includes: 1pcs Long Short Drill chucks note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.