Dremel Keyless Rotary Tool Chuck is a convenient accessory designed for all Dremel corded rotary tools. This keyless chuck, model number 4486, allows for quick and easy bit changes without the need for a wrench, enhancing your tool's versatility and efficiency. I for users who want to save time and effort during their projects, this chuck ensures a secure grip on various rotary tool bits, making it for detailed work and precision tasks. Model Number: 4486