Proxxon 28830 Mandrel w/3 Spring Steel Cutting Blades Proxxon metal cutting blades. Comes with 5/8-Inch diameter, 3/4-Inch diameter and 7/8-Inch diameter cut-off wheels with 5/64-Inch kerf which fits the included mandrel. Spring steel metal cut-off blades for cutting non-ferrous metals, plaster and wood. Made in Germany