End Brush, Product Type End Brush, Quick Change System Not Applicable, Bristle Type Standard Twist Knot Wire, Bristle Material Carbon Steel, Brush Dia. 1 1/8 in, Wire Dia. 0.014 in, Bristle Length 1 1/8 in, Grit Not Applicable, Overall Length 1 1/8 in, Compatible Tool Type Die Grinder, Drill, Impact Driver, Pencil Grinder, Straight Grinder, Color Silver, Primary Material Application Carbon Steel, Connector Type Shank, Connector Size 1/4 in, Operating Speed - Maximum 22,000 RPM