EZ Lock technology allows for quick accessory changes without the need for a screw or wrench. The kit provides the organized storage of popular Dremel accessories in a small, compact footprint. This accessory set offers a reusable storage case with clear lid and lift-out tray for easy organization of the included bits. The kit consists of EZ Lock thin cut wheels, EZ Lock metal cut-off wheels, EZ Lock plastic cut-off wheels, and EZ Lock mandrel.