Combining a high density wheel with medium or coarse mineral results in superior edgework deburring and polishing Harder material density and increased edge durability over 700 Series Unitized Wheels increases life for heavy-duty tasks Aluminum oxide mineral is a good match for ferrous and non-ferrous metals, including aluminum Runs clockwise and counterclockwise, allowing greater versatility when paired with tools and machines Open web is load resistant, contributing to longer abrasive service life Unitized wheel mandrel sold separately.