Cup Brush Product Type Cup Brush Quick Change System Not Applicable Bristle Type Standard Twist Knot Wire Bristle Material Carbon Steel Brush Dia 2 3/4 in Wire Dia 0.02 in Bristle Length 1 in Grit Not Applicable Overall Length 2 11/16 in Compatible Tool Type Right-Angle Grinder Color Silver Primary Material Application Carbon Steel Connector Type Threaded Hole Connector Size 3/8 In.-24 Operating Speed - Maximum 14 000 RPM Shank Length Not Applicable