This high-quality Bosch drill chuck is the perfect addition to any toolkit, with a 1/2 inch size and 1/2 -20 UNF thread. It also comes with an SDS plus adapter which makes it versatile and able to fit a range of power tools. Ideal for those in the sanding discs, sanders, power tools, and business, office & industrial categories, this new Bosch drill chuck is a reliable and long-lasting option for any project. Whether you're a professional or a DIY enthusiast, this drill chuck is sure to meet your needs.