Dremel EZ456B Metal Cut Off Wheel, 12 PackReinforced cut off wheels for twice the performance than the standard cut off wheels. The Dremel EZ Lock makes accessory changes easy as PULL TWIST RELEASE. The one piece mandrel design simplifies the process of changing cutting wheels and makes it easy to cut through metal. For use with the EZ402 EZ Lock Mandrel. Highlights: 12 Pack For use with the Dremel EZ Lock mandrel The EZ Lock system eliminates the need for a screw and a screwdriver First