Surface grinding wheels are abrasive wheels that remove material from metal, wood, glass, and other surfaces more efficiently than hand sanding. Sometimes called surface grinders, they are used in conjunction with stationary and portable grinders and covered in an abrasive grit designed to grind specific surfaces. Straight grinding wheels are designed to grind only on their faces and are for use with bench grinders, pedestal units, and surface grinder machines. Recessed grinding wheels also grind on their faces and have a recessed center which allows them to fit on a machine spindle flange assembly. Use surface grinding segments to grind flat stock or flat surfaces.