Contains 10 EZ Lock cut-off wheels and a EZ402 mandrel. Includes: 4 metal-cutting wheels, 3 thin-cut wheels and 3 plastic cutting-wheels. Reusable storage box Application and material usage information included Effortless locking and loading - no tiny mandrel screw to lose Cut-off wheels last 2 times longer than current fiberglass-reinforced cut-off wheels Compatible with all Dremel rotary tools Cut-off wheels labeled for easy identification First patented system of its kind