Mandrels are used to mount different accessories to use with your Dremel rotary tool.The patented EZ402 Dremel EZ Lock system features a one-piece mandrel designed to simply the process of changing accessories, making it easy to cut through a range of materials from metal to plastic.The EZ Lock one-piece mandrel design eliminates the need for screw, making accessory changes 6X faster than using a standard mandrel.Compatible with all Dremel rotary tools the EZ402 should only be used with EZ Lock cutting, sanding, cleaning, polishing, grinding and sharpening rotary tool accessories.APPLICATIONS: Collets/Misc (brown color code)SHANK SIZE: 1/8" (6.4 mm)1 rotary accessory included