End Brush, Product Type End Brush, Quick Change System Not Applicable, Bristle Type Standard Twist Knot Wire, Brush Dia. 1 in, Wire Dia. 0.014 in, Bristle Length 1 in, Grit Not Applicable, Overall Length 3 in, Compatible Tool Type Straight Grinder, Drill Press, Pencil Grinder, Color Not Applicable, Connector Type Shank, Connector Size 1/4 in, Operating Speed - Maximum 20,000 RPM