Medium to high density construction with medium or fine grade aluminum oxide makes this abrasive a good match for mid-sequence applications such as cleaning of hard metals or general deburring Harder material density and increased edge durability over 600 Series Unitized Wheels provides a longer-lasting wheel for heavier-duty tasks Aluminum oxide mineral is a good match for ferrous and non-ferrous metals, including aluminum Runs clockwise and counter clockwise, allowing greater flexibility and versatility when paired with tools and machines Open web is load resistant, contributing to longer abrasive service life Attaches to tool with a unitized wheel mandrel (sold separately) Abrasive Material Aluminum Oxide Arbor Size 1/2" Attachment Type Centre Hole Diameter 6" Grit Fine Maximum Speed 6000 RPM Thickness 1/4"