Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Standard Twist Knot Wire Bristle Material Bronze Brush Dia 3 in Wire Dia 0.02 in Bristle Length 3/4 in Grit Not Applicable Overall Length Not Applicable Compatible Tool Type Right-Angle Grinder Straight Grinder Color Not Applicable Primary Material Application Aluminum Iron Plastic Steel Connector Type Threaded Hole Connector Size 5/8 In.-11 Operating Speed - Maximum 12 500 RPM