Dremel Multipro keyless chuck for use with corded rotary tools. It has a chuck size of 1/32 inch and is made of steel. It has a dim gray finish and is suitable for 100, 200, 275, 285, 300, 3000, 3" rotary tools. The DREMEL chuck holds accessories without using a collet eliminating having to use a wrench and creating quick and easy accessory changes. Ideal when the application requires numerous accessory changes.