Arbor Size: 1/8 in. in. | Brand Name: Dremel | Compatibility: Rotary Tools | Diameter: 1 1/2 in. | Material: Fiberglass | Maximum Speed: 30000 rpm | Number in Package: 12 pc. | Packaging Type: Carded | Sub Brand: EZ Lock | Thickness: 1/8 in. | Usage: Slicing and Cutting Metal The Dremel EZ Lock makes accessory changes easy as Pull-Twist-Release. The one 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. | Ideal for cutting through metal | Re-slots screw heads and removes rusty nail heads | EZ lock design makes changing accessories as easy as a pull, twist and release | Lasts up to 2 times longer than typical fiberglass wheels | First patented system of its kind. | Compatible with all dremel rotary tools. | Cut off wheels last 2 times longer than current fiberglass reinforced cut off wheels. | The EZ-Lock system eliminates the need for a screw and a screwdriver.