Dremel 5-Pack 1-1/2" EZ Lock Metal Cut-Off Wheels are reinforced for twice the performance than the standard cut-off wheels. They are for use with the Dremel EZ Lock Mandrel and are compatible with all Dremel rotary tools. The DREMEL EZ LockTM 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.