This is the Dremel EZ Lock Cutting Kit. FEATURES: Cut-off Wheels last 2 times longer than current fiberglass-reinforced cut-off wheels Works with all Dremel rotary tools Cut-off wheels labeled for easy identification INCLUDES: One EZ402 Lock Mandrel Four EZ456 1-1/2" Metal Cut-off Wheels Three EZ476 1-1/2" Plastic Cut-off Wheels Three EZ409 1-1/2" Thin Cut, Cut-off Wheels REQUIRES: Installing mandrel on rotary tool and attaching desired cut-off wheel cnh 11/18/08 ir/jxs