[Features] Long term stable: The drill chuck can hold the drill bit tightly and sturdy,not easy to loose, has long service life, suitable for long time work. Ergonomic design: The large clamping force keyless metal drill chuck adopts a keyless self-tightening design, which is more ergonomic. Keyless Design: Keyless and self-tighten type design, allows you to quickly and easily swap bits into and out of the chuck by hand. Easy to install: The keyless hand drill chuck is easy to install and disassemble, more convenient and practical, saving time and effort. Wide Range of Sizes: Large range of fixture sizes, ranging from 2 to 13 mm, suitable for a wide range of drills. [product information] product name:clevis color:Black Material:iron Size: 4.3x7.1cm Packing list (you can get after purchasing one item): clevis x1 Please understand: 1. Due to the long shipping time, the item may be damaged during the shipping process, if the item is damaged, please leave us a message through the official website immediately before posting comments, and I will solve the problem for you. 2. Due to manual measurement, the size may have an error of 1-3cm. 3. Colors may vary from monitor to monitor.