Bosch 18SG-7 Angle Grinder Concrete Surfacing AttachmentThis attachment is tool free, with a removable nose piece and a replaceable brush ring for low cost maintenance. Highlights: Color : Black Material: Plastic Wheel Diameter: 7 inch Dust collection reduces clean up time and provides cleaner, safer air for user Removable nose piece quickly removes for flush surfacing Replaceable brush ring low cost maintenance vs. competition Rugged construction stands up to jobsite conditions Bosch airsweep vacuum